I'm in the same boat. 1992 Dolphin here which I purchased in December. It came with almost nothing for the appliances, equipment, etc. I did find a reprinted owner's manual for the chassis online on eBay. It's just the basic stuff for the truck. It was $40, and probably something I really didn't need, but a car without an owner's manual is strange to me.
I found the manual here:
http://www.ebay.com/itm/1991-Toyota-Truck-Owners-Manual-User-Guide-Reference-Operator-Book-Fuses-Fluids-/231750744926?hash=item35f56bbb5e
Do be sure to check the year of the chassis vs. the model year of the camper. Mine is a "1992" camper, but on a 1991 chassis.
As for appliances and other gadgets, you're best off going online and searching each component out separately to find what you're looking for.
Good luck!