Captain Defenestrator

Question: My question is regarding the first shot of the film. You see the back of a henchman holding a clown mask with a suitcase. Later you realize that this is the Joker, however he is in full make up. So does this mean he was standing out in broad daylight without a disguise on at the very beginning?

Question: When the bank robber has his gun on the Joker, how does the Joker know that the bus will come in time and hit him?

Question: Seeing how most of Christopher Nolan's movies are filled with symbolism, themes, and deeper meanings, what exactly was Nolan trying to say with the brief introduction of the copy-cat Batmen? I ask because it would seem to contradict the recurring theme of "Anyone can be Batman", but I doubt Nolan would include something like that without having a reason that goes beyond simple plot reasons.

Question: Is the Joker supposed to have a high tolerance for pain/injury or something? Some examples: 1)Batman slams his head down hard on a table, violently punches his fingers, slams his head/face into the glass, and then punches him in the face during the interrogation scene, and the Joker simply laughs it off, and doesn't seem to have any broken fingers nor a concussion. 2) When Batman causes the truck to flip over, the Joker walks away without any visible injuries and although he stumbles and falls once, he seems to be perfectly fine. 3) Batman slices him in the face with his zipline, throws him off the building and then yanks him up. Again, no injury (at least a broken ankle?). Does the Joker simply not care about feeling pain, or perhaps even enjoys it due to his insanity? Do the comics ever touch upon this? Because in "The Dark Knight" he's able to withstand some serious physical punishment, the extent of which not many people would be able to.

Question: Quite at the end of the movie, as Gordon and his men are on top of the building opposite the Prewitt building, Batman talks to him and tells him to wait a few minutes. Then Gordon says that he won't wait because the people on the ferries will blow each other up. But why does he know? The Joker just told the people on the ferries. Batman knew as well because he could hear everything going on on the ferries, but he didn't tell Gordon. So from who does he learn this?