http://mbta.com/fares_and_passes/passes/
A monthly pass for the T and bus is $59- that's probably the kind of pass you'd want, or you could pay per ride- $1.70. Your school might offer discounted semester passes. Cleveland circle is pretty close to the D line, too, which is the fastest route into Boston compared to the C and B lines, but the C and B lines are good for doing shopping closer to home. I've only driven in the Boston area, so I have no basis for comparison, but I don't think it's that terrifying. But you won't really need to drive unless if you want to buy groceries in bulk, travel, or have a pet. I think it's pretty common for students not to have cars in Boston.