Guild of Writers

I have literally no experience with 3D modeling with the exeption of Terragen. Would if be posible to do the texturing in TerraGen, am have it show up in the final product. My overall goal is to eventually learn how to make vegitation and what not, but I still need to make the age first, any advice?

It is possible, assuming you're talking about ground or sky texturing. Here's a tutorial from Alcugs:
Link
I assume you already know how to do most of the stuff described there, but pay attention to step three.
Good luck with your Age!