Coffee shop/Refectory prices on campus are quite pricey, but in comparison to some Unis I've visited, are somewhat cheaper.
Clubs in the town tend to have entrance fees, but do cater to students by having regular offers on drinks. The pub and club in the Students' Union have drinks that are really quite cheap which is excellent for a nice night out when you're short on cash. Certain societies also work with the Union to get further price cuts, so if you like to drink, keep an eye out.
Local jobs, as far as my experience goes, are generally hard to come by. If you don't mind working in clothes shops, which as I understand it can be a little boring, you may stand a greater chance, as they're ubiquitous in the city centre, but supermarket chains offer jobs fleetingly.