shutting down engine

ok here goes, maybe a silly question but is it possible to stop and restart the engine on a default airplane say like the cessna c208b grand caravan and also on the same plane is it possible to make it go backwards.. I have tried the F2 key to reverse the prop and that seems to happen but the plane does not move and i'm getting fed up with crashing into walls trying to turn the thing around :( 8)


