I didnt go to school here, but I work on campus 2-3 days a week. In New Brunswick, Easton Ave. will have a ton of eateries and bodegas for odds and ends. There is a Walgreens just past RWJ, and a Rite Aid over in Highland Park. There is construction everywhere, it seems they are putting new buildings wherever they can. They just completed new dorms last summer on Livingston, and it seems like the university is trying to make it so kids dont have to take their business off campus. There is a full scale diner, asian restaurant, mini supermarket, burrito joint, nail salon, ice cream shop, starbucks and a movie theater, all right next to the RAC.
The grease trucks are still on campus, you just need to find where they are parked for the day. Im sure during orientation he will get info on clubs, activities and all that other good stuff.
College Ave., Busch and Livingston are all relatively safe, nice areas. Cook/Douglass is on the other side of New Brunswick from College Ave, and you have to go through the not so nice section to get there.