1.) Nuclear War - Intrigued by the idea that I would be trying to outrun the invisible, following wars aftermath, as well as a general sense of anarchy which would exist.
2.) My telepathic dog (to help locate a clean mate, as well as food), warm bedding, personal radiation monitor and a can/bottle opener.
3.) Just keep moving, looking for beer, then ice.
4.) If I may go post-apocalypse, "A Boy and His Dog", starring Don Johnson