Beach areas, getty museum, or Hollyweird.. Everything else will set you back a few bucks.
There is a ton to do for free but remember that most places you go in L.A. will not have free parking...In L.A. for a nice view of the city go to Griffith Observatory (it s free (even the parking) but you may have trouble finding parking so wear sneakers in case you have to hike up a little... The Grove / Farmer s Market if you want have a chance at seeing celebrities (parking is free at the Farmer s Market area if you validate your parking)Venice Beach is very cool and a trip to visit... definitely see that! Also, Santa Monica Pier... I guess obviously the Walk of Fame for the true tourist experience lol...You can try to book some show tapings if you know when you are going to be there for sure (you have to get tickets ahead of time through the net or through phone), also you can look into some studio tours as wellI mean Los Angeles / Hollywood / Beverly Hills is nice but unless you visit like Rodeo Dr. or something there isn t TOO much to do just wandering around in general...For a very cute Mexican Plaza feel visit Olvera Street (it also has a free tour / museum of L.A. s first house right in the plaza... The Santa Monica 3rd St. Promenade has cute shops and have some cool street performers... especially in the afternoon and on weekends... Drive the PCH (Pacific Coast Highway) as well :)Theme parks: Universal Studios, Disneyland (In Anaheim), Sea World (in San Diego), L.A. Zoo, San Diego Zoo, San Diego Wild Animal Park (both are obviously in San Diego, etc...The Museum of Tolerance is also a nice place to go for an educational experience :)You can choose what you like and map out an appropriate itinerary :)