Question: In the Bible it says God created man, well how was God formed? We know He's the Creator but has He always been there?

Answer: True, Genesis 1:1 starts only at the beginning of time and then proceeds to all the things God created. Note, "In the beginning God created...". God did not feel it necessary to present an argument as to His existence, only a simple statement presupposing His existence. In other words before the beginning there was God. Scriptures also speak of witnesses to, or evidence of, God's existence (including all of creation, see Romans 1:18-20). In like manner, other places in scripture provide an even greater picture of God's "eternalness" (a word I probably made up).

Psalms 90:2 "Before the mountains were brought forth, or ever You had formed the earth and the world, even from everlasting to everlasting, You are God." (NKJ)

Psalms 90:2 speaks of God being from everlasting to everlasting -- which means before and after time. This takes you from before creation, to after time is completed -- when we live in a new heaven and earth forever (Revelation 22:3-5). Other verses imply the "alwaysness" (another word I made up) of God.

Hebrews 13:8 Jesus Christ is the same yesterday, today, and forever. (NKJ)

Revelation 1:8 "I am the Alpha and the Omega, the Beginning and the End," says the Lord, "who is and who was and who is to come, the Almighty." (NKJ)

James 1:17 Every good gift and every perfect gift is from above, and comes down from the Father of lights, with whom there is no variation or shadow of turning. (NKJ)

Malachi 3:6 "For I am the LORD, I do not change..." (NKJ)

All verses that speak of God never changing show us that He has always been the same and always will be. If He had been formed, evolved, created, etc., He could not say that He has always been the same -- unchanging -- because that would be a lie (and God cannot lie, see Titus 1:2). Because we have finite (meaning limited) minds, always bound to think in terms of time, it is virtually impossible for us to grasp the awesome grandeur of a God who exists outside of time -- and always has, always will be the same. Yet, this infinite one God (Father, Son & Holy Spirit) has revealed himself to us by His Word, by His Spirit and by His creation.

Isaiah 43:10 "... Before Me there was no God formed, nor shall there be after Me." (NKJ)

In summary: Can you prove God exists? No. Even though there is good evidence for God's existence, it's ultimately an issue of faith (Hebrews 11:1,6). We must trust that the God who cannot lie, who chose to reveal himself to us, accurately portrayed himself as always existing -- unchangeable.