There are many great places to eat for breakfast, but definitely make the seating ASAP since they always fill up fast:
Contemporary-Chef Mickey's (Mickey, Minnie, Goofy, Pluto, Chip and Dale)
Beach Club-Cape May Cafe (Minnie, Goofy, Chip and Dale)
AK-Restaurantasaurus in Dinoland (Goofy, Donald, Mickey and Pluto)
Epcot-Norway (Princess Breakfast)
MK-Crystal Palace (Pooh Characters), Cinderella's Royal Table (Princess Breakfast)
Grand Floridian-1900 Park Fare (Pooh Characters, Mary Poppins and Bert, Sometimes Mad Hatter)
Polynesian-O'Hana (Mickey, Chip, Dale and Pluto)
I know the Swan has a breakfast too with Goofy, Chip, Dale and Pluto but I can't remember which restaurant it is in...
Anyway, that's all I can pull up for now...hope this helps!