Funny thing is alcohol is not sold or allowed in Disneyland (except at members only Club 33).
It's very much available at California Adventure and Downtown Disney, which are considered part of Disneyland.
No, while they are part of the complex, California Adventure is a separate theme park and Downtown Disney is essentially a shopping district connected to both. Disneyland is only the orignal theme park.
The situation is exactly parallel to that at WDW. Magic Kingdom, the WDW equivalent to Disneyland, bans alcohol. The other 3 theme parks in the WDW complex, EPCOT, Disney's Hollywood Studios, and Animal Kingdom sell alcohol, as do Downtown Disney and the water parks.