lets see... this should've been fairly easy to figure out really...
but for teh opening credits, there are a few good scripts for it, search on hbgames.org, theres a FFVII one or something, that one works pretty well, or Mog's too. If not, you can always use a evented title screen to bypass everything like me, and event your own opening credits, this can't be taught, you'll have to jsut mess around, learn, and get to it through experience
practice and learn
the sun light, all you have to is display a light picture on the map and set it to add.
heres one off strawberry quarts to get you started:
as for the windows, you'll have to make charactersets and place them as events over the windows, but same thing as the picture, set them too add.
as for the night time, just change the screen color tone, something along the lines of -85, -85, -51, 0 would probably work. This is something you'll have to fool around with and learn your self.
hope that helps