Can't drive in the United States because you don't know how to drive? Don't have a valid license from the country you are coming from? Are under 25 years of age and can't afford the extortionate rental policies of most major car rental agencies? Don't feel comfortable driving in US or LA?

I can tell you that in California:

"Visitors over 18 years old with a valid driver license from their home state or country may drive in California without getting a driver license as long as their home state license remains valid."

Frankly, there are no outlet malls that are convenient to public transit from LAX...all of them will take at least three changes of vehicle to reach, and some as many as six. Renting a car (if you can) and driving yourself is frankly the best option.