I had the same problems with NPCs, anyway it's called the edit button.
Could probably use the search button too =/
Anyway...
1. You can make movies using a script that allows avis, but using siwtches, conditional branches, and movement commands you can create what people like to call the RPG Maker Cutscenes
2. No, unless you want to do it with events it's impossible.
3. If you want to MAKE monsters use the database (go to the monsters tab and click change array size and put it to a certain number), use the materialbase and import stuff the battlers folder to add graphics. To do random battles when setting up the map you can choose where the monsters go
4. When making an event... you can select a graphic, the blank box. To add new ones go the materialbase and import character sprites into the characters folder.