Ok, this is where I am confused. Does Mormonism teach that Heavenly Father and Jesus Christ started out as men like us and then through obedience had progressed to godhood? If so, then wouldn't this make Heavenly Father and Jesus Christ 2 separate gods?
Judging from the way you've asked both of your questions so far, I'm going to assume that you are sincere in wanting to understand LDS doctrine, as opposed to just picking it apart. I appreciate that. I'll try to respond with an answer that is sufficiently comprehensive enough that you won't think I'm simply sidestepping the issue but which still qualifies as official LDS doctrine and not as merely speculation or conjecture.
Like all Christians, we believe what the Bible says on the subject (in John 1:1): "In the beginning
was the Word, and the Word was with God, and the Word was God." If I were to try to clarify this statement, I'd say, "In the beginning was the Word (known throughout His mortal ministry as Jesus Christ). The Word (i.e. Jesus Christ) was with God (i.e. with God, the Father, since the word "with" is a conjunction linking two things). The Word (i.e. Jesus Christ) was God (like His Father, Jesus Christ is known to us as "God."). The fact that John 1:1 says, "the word was
with God" is evidence of the existence of two individuals separate individuals. Furthermore, if there is a Father
and a Son, they cannot both be the same individual. Of course, I've heard people say, "Well, I'm both a son and a father." Yes, but no one is a son to himself or a father to himself. Two individuals have to exist in order for there to exist a father-son relationship between them.
John 10:30 says that the Father and the Son are "one." It does not say that they are numerically a single unit. And John 7:11 clarifies exactly what Jesus meant when He said they are "one." It states, "And now I am no more in the world, but these are in the world, and I come to thee. Holy Father, keep through thine own name those whom thou hast given me, that they may be one, as we are." I don't believe that Jesus was praying that we may all someday be absorbed into the substance we call God, or that we will lose our own identities and become part of God. It seems so obvious to me that Jesus was not talking of "one" as a number designating a single unit, but of "one" as describing a unity that is perfect and absolute.
There are numerous instances where the word "one" is found in the scriptures denoting a unity which is not physical:
Exodus 24:3 says, "And Moses came and told the people all the words of the LORD, and all the judgments: and all the people answered with
one voice, and said, All the words which the LORD hath said will we do."
2 Corinthians 13:11 says, "Finally, brethren, farewell. Be perfect, be of good comfort, be of
one mind, live in peace; and the God of love and peace shall be with you."
Acts 4:32 states, "And the multitude of them that believed were of
one heart and of
one soul: neither said any of them that ought of the things which he possessed was his own; but they had all things common."
In every one of these instances, the word "one" denotes unity, and I would say that God the Father and His Son, Jesus Christ are of "one mind." That doesn't mean that they are two individuals who share a mind, but that they are fully united in their thinking, in their desires for mankind. I think it's worth noting, too, that there is one instance in the Bible that makes it absolutely clear that we are talking about two distinct individuals. In the Garden of Gethsemane, Jesus prayed to His Father that "the bitter cup" might be removed from Him. But He specifically said, "Not my will, but thine be done." Clearly, there were, at that moment, two separate wills -- the Father's and the Son's. But the Son gave up His will so that His Father's will would be done.
With respect to the idea that Heavenly Father and Jesus Christ started out as men like us and then through obedience had progressed to godhood, we know, again from John 1:1, that Jesus Christ was known as "God"
in the beginning. We do not teach that He
became God at the time of His conception, His birth, His baptism, His death or His resurrection, but that He was God
in the beginning. We teach that, under His Father's direction, He created our universe. If that was the case, He had to pre-exist it.
Regarding God the Father's beginnings, we have no official doctrine. Some of our leaders have taught that, like Jesus Christ, He once lived a mortal life on a world such as ours. These teachings, however, have never been canonized and are not doctrinally binding upon members of the Church. For the sake of argument, however, let's just assume that He did. To begin with, this (i.e. God the Father's life as a mortal being) would have had to take place
before "the beginning," before the clock started ticking, so to speak. How do we know this? Well, we know that God definitely did exist prior to the time the Bible refers to as "the beginning." We also know that the Bible is completely silent about God's existence prior to "the beginning." Thus, "the beginning" refers not to God's existence but to the existence of our universe and everything in it. Secondly, if Jesus Christ was God before He was born, it would be entirely reasonable to assume that --
if God the Father ever
did have a mortal existence -- He, like His Son, would not have "progressed to godhood" but would have been God prior to His own condescension.
Again, though, I wish to both emphasize and summarize as follows:
1. Jesus Christ was every bit as much "God" prior to His birth as He was during His mortal life and as He is today.
2. God the Father
may have fulfilled a similar role to that which His Son fulfilled
in a time prior to "the beginning" but we have no official doctrine on the subject.
I'm not sure whether or not you believe the Athanasian Creed, but if you do, you will be familiar with these two statements: "So the Father is God, the Son is God, and the Holy Spirit is God; And yet they are not three Gods, but one God." If the Father, Son and Holy Spirit are all "God" but only one God and not three, then either there is a contradiction between the two statements, or else further clarification is needed. I'd say it would be reasonably accurate in the minds of Latter-day Saints to say, "The Father is God, the Son is God and the Holy Ghost is God. And these three comprise one Godhead (Godhead being a collective noun, such as "team.")
I hope this helps some. Sorry that it was so long.