I have no idea about your first question. I do not use maya.
Regarding Autobots? You are talking about transformers movie?
You will probably need to rig or design your model in such a way that it can be animated into robots or cars while animating, unless they have come out with templates to do so. Just google trasnformers rig models and see if you can find any.
"I BELIEVE IN CREATION, NOT COMPETITION"