If i am the first coauthor of the paper, is it possible to change the order of names on the paper in my resume? If i am the first coauthor of the paper, is it possible to change the order of names on the paper in my resume and show my name on the first place?
Since you write that you are co-first author, I assume you are from a discipline where authorship order matters (e.g. life sciences), and then the answer is NO. In fact, this may be seen as purposeful misleading.

The authorship order is essentially part of the paper and how it is indexed.

And if authorship order in your field does not matter, why would you want to do this?