That's where I went. Go Tigers.
Rent in Halifax varies depending on the area, proximity to schools/universities or amenities. The Quinpool area is an attractive one to students. It's about 20-25mins walk to Dalhousie. There's a grocery store, video rentals store, restaurants, Canadian tire, liquor store, the hospital is closeby, not far from downtown and public transport is available. Bus #42 takes you right to campus and only runs from September - April. The #1, 14, 80, 81, 17, 18 will take you very close too.
The main apartment buildings in the area are Quinpool Towers, Quinpool Court(http://www.killamproperties.com/), The Welsford, etc. Rent can be up to $1100 for 1 bedroom apt and up to $975/month for 2 bedroom apt - heat & hot water included. You have to pay for power(lights & cooking) and utilities(phone, internet, cable tv) separately. Most students reduce cost by sharing a 2 or 3 bedroom apt. There are also private residences for rent in the area.
In the South End of Halifax, is Fenwick Towers: http://www.fenwicktower.ca/ , also Peter Green Hall: http://petergreenhall.dal.ca/ ( check if you qualify to live there), Churchhill apartments, etc. There are 2 grocery stores and a hospital in the area. Browse the Dalhouse off-campus accomodation listings as well.
There is airport pick-up service arranged by the school but you have to sign up for it. I think it's free. Feel free to ask any other questions you may have.