1) The first Disneyland Park is open and the second Disney California Adventure Park is open every day too. So, both are open on December 24th. 2) there is a parade (Viva Navidad) with Mickey in California Adventure, a tree on Buena Vista, and the Christmas Parade "Fantasy" (but I do not know if Micky is here.)
You may look at Disneyland website for. Parade time
How much does the ticket cost in December, or Christmas?
1. Yes 2. No idea
Thanks! Your answer is awaiting moderation.