A friend of mine, who is a college student, would like to create a forum, similiar to craigslist, that encourages the exchange and sale of books and items between students at his school. He plans to keep it a private site because students must have a university email address in order to sign up. The website allows students to make posts about things that they want to buy or sell (textbooks, furniture, electronics), rooms for rent, jobs wanted, and pretty much anything else. He'd also include classroom forums devoted to different department where students can post questions about assignments, tests, or any class related material. We will also have links to CP weather, and potentially bar/restaurant nightly specials.
What legal issues would need to be addressed? Trademark? Registration? Any help would be appreciated. Thanks!