What are the NCAA rules on agents and is there a list for that?

NCAA rules forbid student-athletes to agree, orally or in writing, to be represented by an agent or organization in the marketing of his or her athletic ability or reputation until after the completion of the last intercollegiate contest, including postseason games.

I would talk to your AD or other people in your athletic department. There should be a compliance person there who is making sure you are abiding by the rules and to discipline those who don't. The basics are that you can't receive anything of value. Some of the little things that have gotten people in trouble before are getting a ride a bagel & cream cheese etc. So it isn't like it has to be a car or cash. It can be much less. But your compliance person in your athletic department should be able to give you all the information you need.