OK, FWIW, of course Temple is not in the safest of areas. Having said that, I have been there during all sorts of odd hours (11-6 AM, coming or going) and have never had a problem. In the past year, I do know of two incidents on the Broad Street subway line (one professor was attacked and injured pretty badly and another was attacked but managed to get away). As long as buying a car isn't prohibitively expensive for you and you don't mind not living in the city (parking in the city is often a hassle and a paid parking spot will cost ~$100-200/month, in addition to the ~$70/month you will pay at Temple for parking...not to mention gas/insurance...), that is certainly an option with some advantages (i.e. increased mobility and safety). However, it is certainly not necessary to have a car (at least during the first two years) and many students (and some profs) do just fine with public transportation.
Re the comment about safety at Temple: just be careful/watchful (although the area as a whole isn't safe, they do a pretty good job of keeping the campus itself safe).
Re the comment about med schools sending students off-site: I believe that this is fairly common (not necessarily a bad thing: when you are choosing clerkship sites/blocks for the third year, you may well find that upper classmen recommend non home sites, at least for certain rotations).
EDIT: Just to clarify, the incidents on the Broad Street line occured at its northern extremity (not near campus) and, although they both occurred within the past year (actually, within a couple of months IIRC), these are the only such incidents that I am aware of. Personally, I have never been afraid while on campus.