We went last year, and it was our first time as a family. On a whim, I called one night and booked breakfast at Goofy's Kitchen the next morning. We had to go to a little later in the morning, but that was fine for us.
It's buffet style, and it was wonderful. They did start putting lunch things out, too, so I guess they kinda transition from breakfast to lunch. For characters, we met Sleeping Beauty, The Mad Hatter, Max, Goofy, Chip and Dale, is who I can think of off the top of my head. That was our first time going to a character breakfast, and we had a blast.
For prices, I want to say it was about $70, for 2 adults and 1 child. Ds was only 19 months at the time and we didn't need to pay for him.
This time, we have paid for 2 character meals already, and I am thinking I will add Goofy's Kitchen for breakfast the day we leave. It was just too much fun!