I'm going to try and answer all the questions on this one reply.
First of all like I said, using the KJV bible to form a doctrine of the Godhead is not easy due to the Trinitarian mindset of the translators.
Philippians 2:6 in the KJV bible seems to say that Jesus did not think it was robbery to be equal with God, but this is not what Jesus is saying. Compare the versions and see the difference.
-- King James
Philippians 2:6 Who, being in the form of God, thought it not robbery to be equal with God:
-- Revised Standard
Philippians 2:6 who, though he was in the form of God, did not count equality with God a thing to be grasped,
-- Simple English
Philippians 2:6 Though Christ was divine by nature, He did not think that being equal with God was something to hold onto.
-- New American Standard
Philippians 2:6 who, although He existed in the form of God, did not regard equality with God a thing to be grasped,
-- New Jerusalem with Apocrypha
Philippians 2:6 Who, being in the form of God, did not count equality with God something to be grasped.
-- American Standard
Philippians 2:6 who, existing in the form of God, counted not the being on an equality with God a thing to be grasped,
-- New American with Apocrypha
Philippians 2:6 Who, though he was in the form of God, did not regard equality with God something to be grasped.
These other translations fit more with the whole of Scripture even in Jesus' own words.
John 14:28 You heard me say to you, 'I go away, and I will come to you.' If you loved me, you would have rejoiced, because I go to the Father; for the Father is greater than I.
Very, very clear...
Now, being in the form of YAHWEH tells me Jesus is not YAHWEH because a form of anything is not the real thing but rather a form of it.
2 Timothy 3:5 Having a form of godliness, but denying the power thereof: from such turn away.
A form of godliness but not the real thing.
Jesus was in the form of YAHWEH because He was the expressed image of HIM.
2 Corinthians 4:4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
Jesus is the image of YAHWEH in the same way Adam was made in the image of YAHWEH.
Genesis 1:27 So God created man in his own image, in the image of God created he him; male and female created he them.
There is nothing that says Jesus was equal with His Father prior to His birth in Bethlehem.
The bible says Jesus was born in the likeness of man vs the likeness of angels.
Philippians 2:7 but emptied himself, taking the form of a servant, being born in the likeness of men.
Hebrews 2:16 For verily he took not on him the nature of angels; but he took on him the seed of Abraham.
John 14:15 to 20 tells us that it's Jesus who is with them, who is leaving them and who is returning to them and will be in them. This is not at His second coming because it says later, which you now see and hear.
Acts 2:33 "Therefore being exalted to the right hand of God, and having received from the Father the promise of the Holy Spirit, He poured out this which you now see and hear.