Seeing Jesus in the Old Testament

In John 5:39,40, Jesus said, "Search the scriptures; for in them ye think that ye have eternal life: and they are they which testify of me. And ye will not come to me that ye might have life." Jesus was talking to the Jews and they didn't have anything but the Old Testament and Jesus was saying that the Old Testament scriptures are all about him. Not an it or some word in God's mind but he has come to give us life. I see the the Old Testament is about Jehovah God and his dealing with the Hebrews so who does that tell us Jesus is? We need to see Jesus in the Old Testament before we take a clear look of him in the New Testament.
In the Old Testament, Genesis 1:26,27 says, "Let us make man in our image, after our likeness.." The next verse says, "And God made man in his image,..." Why does it go from plural to singular. Keep one thing in mind that Jesus said that the Old Testament is about him in John 5:39,40.

A few Old Testament verses in reference to the coming of Jesus. Isaiah 7:14 says,
"Therefore the Lord *(Adonay) himself shall give you a sign; Behold a virgin shall conceive, and bear a son, and shall call his name Immanuel."
(Immanuel means 'God with us.')
* Check Isaiah 6, in next chapter for more information concerning Adonay.

I don't know of any place where Adonay is used except for God in the whole Bible.

Isaiah 9:6
"For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counselor, The Mighty God, The Everlasting Father, The Prince of Peace."
We see from this prophecy that Jesus is called the Everlasting Father, everlasting is time without beginning or ending. (I can't see anywhere in the word of God that tells me that Jesus was the Son of God until a body was prepared for him or check out prophecies concerning him such as Daniel 3:25, or Abraham about to sacrifice his son in Gen. 22:8-13.)
I see in Hebrews 10:5, "Wherefore when he cometh into the world, he saith, Sacrifice and offering thou wouldest not, but a body hast thou prepared me:"
Jesus was called Jehovah in the Old as was the Father and he is called the Father here in Isaiah 9:6.

Micah 5:2
"2 But thou, Bethlehem Ephratah, though thou be little among the thousands of Judah, yet out of thee shall he come forth unto me that is to be ruler in Israel; whose goings forth have been from of old, from everlasting."

.Whose "going forth" has been from old, even from everlasting.. Jesus has been from old, that is after time was created, but as God he has been from everlasting.