Thanks for the feedback guys! Wreck it Ralph was a bit of the inspiration along with a lot of John K.
I haven't done any mechanical modelling in zbrush before so I figured this challenge would be a good time to learn. I've been going through David Bently's car design tuts in the zbrush classroom and they are fantastic.
The car is loosely based on a ford fiesta and still needs work but I've been enjoying the process so far. A lot of dynamesh, trim, slice and clip brushes as well as the polish brush. Also used micromesh for the first time for the grill.
Just a quick update on the car, The modelling is pretty much done, except for a little bit of damage protruding from the struts.
So far all zbrush, except for any text, which was done in PS and mapped on using spotlight.
For the windows I created a messed up object, set it to be subtractive and merged the window mesh down with it, then hit the sub button in the dynamesh panel. The windows had to be a dynamesh for this to work. The other cuts were just the trim tools.
I didn't rough in any muscles first for the face, I just dived in because I want him to be a bit cartoony.
For the arms I will probably draw the anatomy with polypaint over a simple version of the mesh.