oh really, do you know any schools in L.A?
For Undergrad, UCLA and USC are great LA schools, however there are pros and cons to both. UCLA is a UC and will be cheaper than USC which is a private school. Although UCLA has a big campus and a large faculty steered towards research, the class sizes are very impacted and the research opportunities are very competitive. UCLA does have a nicer campus with more libraries and facilities (i.e. 3 places to play basketball, 2 for tennis, etc.), but USC will have more student resources (i.e. alumni connections and pre-med adviser). UCLA does not have a pre-med adviser and most information will need to be found yourself, however, the Westwood location and close drive to Ronald Reagan, SMH (Santa Monica hospital), and SJH (St. John's Hospital) will let you have more options to volunteer, research, or shadow at various close distanced hospitals. Plus the neighborhood is a safe and secure upclass neighborhood next to million dollar estates and metropolitan condos. USC on the other hand is located in the downtown area where it has a very different community than UCLA. The benefit though is USC is very close and affiliated with the LA County and you may gain the best experience working there opposed to a well controlled environment in LA (Lots of cops). Both UCLA and USC have a list of very unique majors tailored for a variety of people such as health promotion and disease prevention (USC), kinesiology (USC), psychobiology (UCLA), and cybernetics (UCLA) and this should also be factor in picking your school. Just a reminder, all pre-meds will need to take the same required classes to matriculate into medical school, you can be whatever major you wish however many pick science majors such as Biology since there are a lot of overlap with the major and medical school requirements.
Prestige should not be a priority as it will play a very small role compared to the long list of other factors such as ugGPA, MCAT, Clinical experience, volunteering, Letters of Recommendation, interviews, etc. (which are all more important than the ranking of your school).
For medical school, where ever you go you can't go wrong in the United States. Some are more tailored towards research and others are to primary care and depending on where you see yourself in the future, this may be an important factor to consider. Comparing the two Los Angeles schools, there are again pros and cons for both USC and UCLA. UCLA has a pass/fail grading system, USC has high pass/pass/fail grading system (which is pretty much similar to the letter grade). UCLA med students have more time to study for the Steps, however, USC students seems to be more prepared. USC is geared more towards primary care and have LA County while UCLA is a research heavy school. Keck (USC) is still located in downtown, UCLA is located in westwood next to the Undergraduate campus (big campus). Westwood has very limited available parking spots, USC has tons. UCLA has a cheaper tuition, but equal class size to USC. Both are great schools and I am sure you will be happy with either one.
If you have more questions, don't hesitate and ask away.
-BS
[Edit] I have just been informed that there is a pre-med adviser at UCLA in the career center [/Edit]