[D-Bo]

well i have my license and i can drive but not up here in the great white north with all our snow. so my car is sitting on my driveway right now, not on jacks or anything. i dont even have a cover on it. i've just been letting it snow (we have almost 2 feet right now) and clearing it all off as much as i can.. i start my car every 2nd or 3rd day (i'm paranoid, you won't need more than once a week) and leave it on for about 45 minutes.. this gives the car time to fully warm up. you need to run it long enough so that all the moisture evaporates from all the exposed metal (mainly exhaust) and so that the oil is distributed evenly through your whole engine; you don't want it to drain to the pan and sit there aging.
for my tires, i'm getting new ones before it goes back on the road (my old ones are toast) so i don't care about it sitting on them. eventually what will happen if you leave it on the tires is that they'll warp and will wabble when you drive it in the spring. SO, if you're keeping those tires, put it up on jackstands. if you don't have jackstands, you could inflate them to their max psi too but thats still shitty come the spring.
if it already has rust then you can't stop that, so let it rust. wait till the spring to get body work done (if you need to). if you want to get a cover for it, they can be expensive but they're worth it. the only shitty thing is that you won't be able to get in it as easily if you want to start it.. other than that, make sure you have a full tank of gas to prevent condensation.
thats about all i've been doing and she starts perfectly every time