Depending on the casualty rate and who moves quickest, there might just be plenty of guns to go around. Oh and depends on what country you live in I guess (your filename implies its somewhere they speak German). The stores in North American cities would be cleaned out by the local rednecks or gangsters pretty quick, but if those guys end up dead soon too maybe you can pick their bones later. Also if most of the people in my neighborhood died this week I know I could just break into the houses of the dead and eventually find something, there are lots of hunters around here. We have a few rifles here at the house but not enough ammo for the big PA.
My friends bought an ambulance this week to turn into their punk rock tour van. For a second I thought, that'd be a cool vehicle to add to the transportation box on this template, it's got electrical outlets and all kinds of cool shit. Then I realized its not very fuel efficient and with people shooting each other over the last supplies of gas in town, you might want a cheaper ride.