Today, Disneyland has two different meanings - there is Disneyland Park (the original park) and Disneyland Resort which encompasses the entire property - Disneyland Park, California Adventure, Downtown Disney, and the Disney owned hotels. Why? First, with the addition of California Adventure, a name was needed for the entire resort. Secondly, for legal reasons: you can trademark an adjective but not a noun. So the trademarked Disneyland had to be used as an adjective by putting it in front of a noun (Park and Resort in this case).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.It's very much available at California Adventure and Downtown Disney, which are considered part of Disneyland.Funny thing is alcohol is not sold or allowed in Disneyland (except at members only Club 33).
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.
The correct analogy to Orlando is Disneyland Park is to Disneyland Resort as Magic Kingdom (Park) is to Walt Disney World (Resort).