Hey SaintRaphael,
There were quite a few BMSers who ONLY went to exams but I would say many of us attended lecture (whether sporadically or every day). I don't know if the exam-only students successfully matriculated mostly because I wasn't friends with any of them. In general, I went to class, regardless of time because it forced me to get out of bed and once I was awake, I knew that I had to spend the rest of the day studying. I also didn't like waiting for the lectures to come up for download to get my first exposure to the material. I personally used the online lectures as refreshers on the weekend, something to listen to while I cleaned my apartment or whatever.
Regarding Class Couture: People went to class in jeans and a t-shirt, or in my case from time to time: sweats (egads). A lot of BMSers did, really so don't worry about dressing to impress, the profs may be more impressed if you have real questions to ask them and show that you're genuinely interested in the material than whether or not you are wearing your undergraduate sweatshirt
I lived on campus, but towards the end of the year, I spent a lot more time commuting from downtown via car/metra. The only thing I can say is that in more inclement weather the Metra gets delayed so I wouldn't rely on that as your sole source of transportation especially if you intend on going to class every day. But the ride down is nice and it is really easy to get stuff done.
BRS physiology is a DEFINITE MUST. If there's any book you'll need it's this one to help learn the general concepts before honing on the details emphasized in class. And then when you successfully matriculate (fingers crossed!) to CMS, you're gonna need it again to study for boards.
I personally was also a big fan of West's Respiratory Physiology text because it condensed the Resp unit very nicely and was another exposure to the material. I finished reading it the Wednesday before the Respiratory exam and it was probably the reason why I aced that test. However, not everyone liked the book and so try before you buy it in the library! Some people might try to push for Vander's Renal, but I think Dr. Peterson does a really good job of presenting the material, stay on top of that and you won't need the book.
For neuroscience, get the Haines Atlas. The neuroanatomy portion may take images from this text and I much prefer the brainstem sections in this book as opposed to neurosyllabus (google the website, it's pretty cool but don't spend too much time on it now, relax before your year starts!) I also had Purves, but I hardly ever read it.