For the first one, just use the "Set Move Route" command, coupled with the "Wait for Move's completion." If you want dialogue during the scene as well, however, you're going to have to use Ccoa's UMS and create a map long enough to last for the duration of the scene.
For your second request, I'll assume you're using the DBS. What you're going to have to do is to add an event page to every battle in which that monster is present, and have it add one to the variable when that monster is killed.