It's $99/person, but there is $20 discount for APs or AAA members. The tour DOES NOT include admission into either park.
I believe the tour goes daily. I went on Monday.
One of the best parts of the tour was when we got around to the Hollywood Backlot street and everyone was being held at the rope before the park opened. Our tour guide said, "Time for the tour advertisement!" and told us to zip up the street so everyone could see us! hee hee!