You will usually not find out whether your courses have required textbooks until you get the syllabus at the first class meeting. New (and occasionally some used) copies of textbooks can be purchased at the Rutgers University Bookstore at Ferren Mall. Parking for brief periods is free in the deck next to the Bookstore, if you remember to get your ticket stamped by a Bookstore clerk. Those interested in buying used copies of books from previous semesters (make sure it's the right edition!) should monitor the LISSA listserv or post a message indicating which books you are looking to buy. Some textbooks may also be available from online booksellers such as Barnes & Noble or Amazon.com.
If you don't already have a computer, there's a helpful site "What type of computer to buy for Rutgers?" at http://rucs-nbp.rutgers.edu/newcomputers.php. This includes a link to findTech Connections which helps find computers at "academic pricing," though of course you will want to shop around.
The New Brunswick/Piscataway Computing Services (NBCS) website has all the information you'll need to find the campus computing labs, download software, sign onto the campus wireless network, manage your email account, and more. When in doubt, call or email the help desk.