Q. Does Colossians 1:16/John 1:3,10 Prove trinity?

Col 1:16 “For by him all things were created, in heaven and on earth, visible and invisible, whether thrones or dominions or rulers or authorities—all things were created through him and for him.”

This does not prove anything other than the fact that Jesus was very neccessary for creation to even happen. Something anti-trinis. agree with. It would be unreasonable to assume that His firstborn would just sit back and watch his Dad do all the work. Now I post scriptures.

1 Corinthians 8:6

" there is actually to us one God, the Father, from whom all things are and we for him; and there is one Lord,Jesus Christ, through whom all things are and we through him"

John 1:3"All things came into existence through him, and apart from him not even one thing came into existence.:

John 1:10"He was in the world, and the world came into existence through him, but the world did not know him."

What do this scriptures above say about God? From whom all things are. What does it say about Jesus? Through whom all things all. This isn't even a complicated matter. I'll use a simple anology. A pizza hut chef makes a pizza. The delivery driver delivers the pizza. "Not one pizza has been delivered without help from the delivery driver" 

Did things come into existence through the Father? No

Did things come from Jesus as 1Corinth. 8:6 says? No

Did things come from Jah the Father? Yes

Did things come though Jesus Christ? Yes.

So using the following scriptures as a Pro-trinitarian argument doesn't really hold up much scrutiny.