Any of the D cameras would be fine, but as Ken pointed out, you can probably get a K100D for not much more, and it has shake reduction plus much-improved jpeg processing, if that's important to you.
As for lenses, you really can't go wrong with the DA 18-55 that's usually kitted with these cameras. It's obviously not a top-notch lens, but it's excellent bang for buck and you can play around and see what focal lengths you end up prefering.
I suggest that you hunt up some pictures of cars here and over at dpreview (I know there are a few who do some very nice stuff at both sites) and see what focal lengths they're using. That should give you some idea of what lengths will give you the look you're going for.
And once you've done all that, post some of your photos here so we can admire them!
Julie