Hey,
I've seen the accommodation and most of them have limited car parking facilities so I dunno how likely it is you will get a space. Only a few of the accommodations are so far away that you would HAVE to take a bus, but most are on a main bus route anyway, and the average distance from Uni is about 15-20 minutes walk. I'd not say that you need a car, and Leeds is a nightmare to drive in!!
The only friend of mine who has taken her car to uni is now in her second year, and she has a house with 4 other people but lives in Headingley so I think that's more so why. I'd say you should walk or use the bus service, they even have a FREE bus service!