Hey steadierfooting,
I'm not an Ethics, Society and Law student, but I'll try to answer some of your questions from my own experience and from those of the people I know :) In ES&L, there aren't a lot of required courses, so you're pretty free to take any combination of subjects that interest you in addition to the ones you do have to take. You'll also have to take seminar course, TRN412, in your fourth year. See here for more info:
http://www.trinity.utoro...ts/requirements_esl.htm
Also, did you apply for a college yet? The program is hosted at Trinity College, and I believe there is an Ethics, Society and Law society as well. As for your interest in politics, ethics, philosophy, law, morality, etc. you're in the right place - the Munk School of Global Affairs regularly hosts lectures and roundtables by some pretty well-known people (and it's mostly free, you just have to sign up for them). Most of the people in your program will have similar interests to you as well, so prepare for some stimulating conversation!
As for U of T life in general, I'll just say this: it's what you make of it. You'll probably have heard of intimidatingly large class sizes (I walked in late to a class of 1 200 on my first day...it was pretty scary) but it'll be loads better once you find people to sit with. Tutorials will make up for it, and there are also First-Year Seminars with smaller sizes (24 students), as well as First-Year Learning Communities (FLCs) that you can join. If you're a commuter student (which most of U of T is), there are several commuter lounges to hang out in. Pretty much all the school is yours to discover, and that's what I like most about it. If you're the kind of person who appreciates architecture and books, you're in the right place :)
People also say the social life/school spirit sucks, but like I said, it's what you make of it. Make sure to attend your frosh week because that's where you'll meet most of your friends. And though it might be tempting, don't skip classes - many of them are two hours long, so you'll be missing a substantial amount if you do. If you can't avoid it, though, make sure you get someone to send you their notes. Also, don't fall behind your readings! Not to scare you but this is university, and sometimes you'll be burning through 60+ pages a night on one subject alone. On the bright side, since you're an artsci, you'll have a lot of free time on your hands. Use it well. There are literally hundreds of clubs on campus so whatever your interest, there's one for you. And if not, you can start your own!
There's an open house in March with a program fair and college tour, so if you still have any questions, you can ask them there.
http://discover.utoronto.ca/marchbreak
Good luck and hope to see you next year! If you have any more questions, ask away and I'll try to answer them :)
University of Toronto St. George, Social Sciences