Thank you for those verses, but they have nothing to do with the false doctrine called the trinity.
[John 10:30 I and the Father are one.]
Jesus had every right to say that. Jesus said that he was here to do his father's will and that he was here in his father's name. Jesus represented his father in everything that he did. He was insync with the father. God was working through his son. (2 Cor 5). You have to remember that Jesus was a man. He even called himself a man too. Did he forget that he was a God? No, of course not.
Cant we say that me and my wife are one? Or I'm one with my family? Absolutely. Jesus is not God, there is only one God. He is the "image" and the "likeness" of his father. A perfect manifestation. It's just strange that Peter says in Acts 2, when he's standing up and talking to a large group of people that all of Jesus's miracles werent his, but it was his father's miracles that he was doing through his son. I just find that strange that Jesus cant do anything without his father if he was God himself.
[John 14:20 In that day you will know that I am in my Father, and you in me, and I in you.]
You might want to read that verse again. He's talking about himself, God and us. Same with John 17.....