All possible with Maya, just gotta search around for the right tutorials for each
Basics
Maya Tutorial: Basics part 1 of 5 - YouTube
This is what just about everyone starts with for car modeling
https://www.3dm3.com/tutorials/maya/350z/
This should help you get a grip on character modeling
https://www.3dm3.com/tutorials/maya/character/
Environment modeling is a pretty vague subject, so I can't really help there. Depends on the type of environment
And creature modeling is pretty much an extension of human modeling, in the sense that is uses the same techniques (as far as I know)
Last edited by Acid44; 19-08-2011 at 10:31 PM.