1) The first question is hard to formulate an answer to but I tend to look at it from this point; a “begotten” son of a human being is obviously another human being. Taken in that context, a “begotten” son of God therefore, would in-fact be God. Jesus is God by his very nature. God, is eternal, He wasn't created, He is the alpha and the omega. That being true, Jesus himself should also be eternal and He is, so He also takes on the very nature of God. 2) Yes, John does make distinctions he asserts that Jesus is unique, one-of-a-kind, He is the Monogenēs, the One-of-a Kind, eternal Son of God. Jesus, like God has existed forever and is God in every way except that He became human. Jesus, like His Father is eternal and perfect, but he became human so that he could enter into our world to be crucified for the salvation of all mankind. 3) Here’s another tough answer but the answer has to be that there clearly is only one God. The three “entities” of the trinity are all God but they are individual entities of God. Any action taken by any member of the trinity is the action of God Himself.