no housing close to the mountain really, banff is as close as you get and it's a 15-20min drive to sunshine, another 20 to lake louise, you can't really live in lake louise unless you're working there
when you first get there you'll probably have to stay in the hostal, HI is super nice but farther from dowtown, Samesun is closer to town but not as nice, there's also a sketchy house across from the employment office on bear street that you can rent beds by the week, it used to be $100/week like 3 years ago i have no clue what it is now. that's where i first stayed when i get there start of season in 2005 and met my whole crew there that stayed together for the whole season
housing is super tough to find, the paper only runs like 3 adds a week and they're pretty much rented out that same day, it might be easier in september, and probably easier to get a whole house than just a room, lots of people end up staying in canmore, cheaper and way more available and nicer
for work, just walk around i guess, and check out the employment office for free internet, printer, photocopier, fax, etc., also there is a temp agency if you want quick cash.  keep in mind its gonna be super slow in september or pretty much dead until the season starts and then not really busy untill christmas.  try to score a big3 pass, there's like a locals discount if you sit through a presentation, it ends up costing pretty much the same as an early season i think, have fun if you have any specific questions feel free to ask,
peace