Here, several facades show some decoration from a recent shoot. If you're watching a show or movie and it's not obvious that an actor is in a certain city (like, they're standing in front of the Statue of Liberty), they're almost certainly not. They're probably on a backlot or soundstage somewhere.
My tour was shortly before the release of "Batman v Superman", so there was a lot of Batman stuff. In one space, several vehicles from the various movies sat together. Based on car chassis, they all ran under their own power (some better than others).
Which sets you can visit varies. I've done this tour four times over the years and each time you see something different. It depends what's shooting and what's on hiatus. Turns out we weren't supposed to take pictures in here, so I won't say what show this is.
Yep, you get to sit in a reproduction of the Central Perk set. Depending on your timing, you can even take part in a fake "episode" where you say lines and interact (on screen) with Monica and Phoebe. Everyone who did it seemed to love it.