Some great ideas in this thread so far.
Snake Plisken from Escape from New York
Max from The Road Warrior (w/ the dog, of course)
Conan the Barbarian (the REH version)
A generic 1/24 scale accessory set for converting car models into Post-Apocalyptic vehicles - various weapons, some armor plates, various other bits like spiked rams or some skulls or shot up Speed Limit signs. Maybe a leather clad driver sporting a mohawk...