1) There is no VIN, but there is a Serial Number. What's odd looking about it? Post the number for us, that will tell where it was made, when it was made, what series the truck is, and what number off the line it was that year.
2) Passenger side has a vent, cause that's where fresh air is going to enter, to go into #3 below.
3), Appears to be a Fresh Air Heater/Defroster, mounts to the passenger side, takes air from the outside vent above.
