You can walk to The Wave in about 10 minutes from the exit of MK. Just follow the path that goes along the bus area (there are signs).
GF Cafe might take a little longer to get to. You’d have to take the boat (quickest) or monorail (all the way around so longer). Maybe 15 minutes by boat depending on how long you have to wait for the boat.
The only other sit-down breakfast is Be Our Guest, but it's pricey and you still need an ADR. You can get some breakfast sandwiches at the Starbucks on Main St and Sleepy Hollow has breakfast waffles (both sweet and savory), but those are both walk-ups and don't have much seating. Gaston's Tavern also has a HUGE cinnamon roll and it's yummy.
The only other sit-down breakfast is Be Our Guest, but it's pricey and you still need an ADR. You can get some breakfast sandwiches at the Starbucks on Main St and Sleepy Hollow has breakfast waffles (both sweet and savory), but those are both walk-ups and don't have much seating. Gaston's Tavern also has a HUGE cinnamon roll and it's yummy.