Travel in Sheffield Watch
Trams are relatively cheap too, there's a ticket you can get online that allows travel on both trams and Stagecoach buses for a week, so that's worth checking out too.
Yup, each journey. (depending where it is obviously) I'm in uni 4 days a week and it only costs me around £10 a week for journeys there and back. Which is a lot cheaper than other places I've been.