Timetable is easy: those are your lectures. LASS = Law and Social Sciences, Pope is the pope building (somewhere down in science/engineering land), but as for Artcen, search me! Those are indeed your modules, but for books I would wait until you turn up to get them. The lecturers will tell you in your first class what to get, and there'll be plenty of second years selling them on at a discount (but be wary of old books/ones that are no longer recommended, I'll be trying to sell these dodgy ones to the second years, so no ratting me out!!).
That timetable is for the full year. BAsically, the modules marked "... A" are semester one and "... B" are semester 2, with understanding law ("UL") only running in the first semester, that's why it looks like you have a ridiculous number of lectures. Also, UL is divided into seminar groups, which is why it looks like there are a ridiculous number of hours for it and a stupid number of 9ams, which will become your worst nightmare!
I wouldn't bother about buying before you get there but at a guess I'd say the books are as follows:
Constitution: Bradley and Ewing
Contract: McKendrick
Tort: Giliker and Beckwith
I really wouldn't worry about UL books, because it's a joke of a module anyway. Mensan, I'll probably be around HuStu on the first day as my housemate (last year's pres) is standing in for a few weeks until they elect a new one (since this year's failed his resits, in true JCR member fashion), so I figure I'll come and see what the new crowd is like (and destroy that godforsaken cafe... which I haven't seen yet!). Tis the place to be, you'll probably see me at all the events where I can wangle some free booze by being a VIP...