If anyone knows how to help me create a script that,..by a click of a button enables you to create a character.

By that i mean i have all the blendshapes for male, female, boy, girl, fat, thin, etc.. all cartoony...and all rigged too.

That already exists (kinda). It's called Poser by e frontier. The latest version is 7.x

This seems like it might be a bit over ambitous for a first time Maya plugin development project.