This is a good discussion of medical school requirements, and how to study for the MCAT:
http://talk.collegeconfidential.com/pre-med-topics/1996629-math-major-in-medical-school.html
Math or statistics majors are getting into medical school these days, but you can major in anything that interests you.
Do a search on what to major on for premedical and also see a premedical advisor at UCLA. If you can visit premedical advising now, you may get some hints on what to take at community college and what to take at UCLA,
ask them.