For your second question....
Go to the second page of the event commands menu, and click on Scroll Map.
Then you just adjust what direction you want the screen to move (you want it to follow a character going off-screen, so whatever direction he or she is going), how far and how fast you want the screen to move. It's called 'panning'. You probably want the screen to move as fast as the character it's following, so check the character's speed first.
That's all. Good luck.