Are you buying new or used? Check this thread out on a local forum with complete info on how to import.
http://forums.beyond.ca/showthread.p...hreadid=107279
The website you want to check for cars that are OK to import are at
www.riv.ca
I helped my uncle move back from California to Calgary in November. He brought back a '97 Toyota Camry and '97 Ford Escort. I believed he paid $250 each for paperwork and A/C tax. The only problem we had was that we didn't inform the border officers 72hrs in advance so we had to cross the U.S/Canada border a couple of times.

My only other advice is try to stay calm with the Canadian border officers. I've never had an encounter with one who wasn't an a$$hole.
Good luck.