I have a driving licence and a job - but no car. I think they're too expensive and a waste of money to be honest, so I'll be catching the bus everyday.
if you live off campus, probably in the 2/3/4 year i would advise it. Personally i got the bus in my second year, it was a 30-50min trip each way and was a drain. i would go as far to say it affected my second year grade, because i simply could not face getting up/ready for a 1hr lecture that in total would take 3hrs up...
Try to work over the summer, and buy a car for your 2/3/4 year (if you live more than 5 miles away from campus/uni.
A 1.2/1.3 engined 1990+ vauxhall, or ford, nova/corsa/astra, fiesta/escort will cost between £500 - £2000, and the insurance will be about £1000. It costs about £20 a week to run (£15 petrol/£5 tax etc).
These cars are reliable, and very cheap to repair/find spares. Avoid anything from china/japan, and ALL french cars, whilst old german VW/bmw are too expensive for repairs.
It will be a bit of a drag financially, but from my experience it is JUST possible! Also if it goes 'pete tong' you can sell the car - remember old fords/vauxhalls dont lose money, cancel the insurance, and reclaim some of the tax back.