There's also a Joffrey's coffee cart at the TTC, in between the monorail ramp and the ferry ramp. We usually hit that on the way in because we prefer it to Starbucks.
The have some donuts and other pastry type items as well, but not 'real' food. If you're wanting like, actually sit down and eat breakfast, you basically have to make a reservation. Be Our Guest and Crystal Palace both offer actual solid meals.