Goofy is now closed. The building is now a meet-n-greet with the Toy Story folks: Woody, Jessie, Bullseye. When we were there, Woody wasn't there - just Jessie and Bullseye.
If you want to see Buzz, he usually hangs out at the Buzz Lightyear ride as you come out the exit. We've always seen him there first thing in the morning.
Another place to see Buzz, Woody and Jessie is at MGM at Al's Toy Barn. They also show up at the Stars & Motorcars parade at MGM.