New Class B owner with a few questions

Not clear to me who sold you the RV? If it was a dealer and not a private sale you should insist on a complete mechanical checkup with all the essentials ticked off on a list. If an RV dealer, they should have checked the stove,fridge,furnace,lights etc and noted any problems. Buying a vehicle of unknown condition is very risky IMHO. I had a full listing of the entire vehicle done professionally and it was serviced and had new brakes installed all round. Maybe the price was good so you might have to pay for brakes and tires but at least the seller should let you know about it's condition and not just that it is a good vehicle. Sorry if this is boring but I have owned several RVs and am leery of tricky salespeople. The generator may indeed have been removed by the last owner--why I dont understand!!
Best wishes for a good purchase. Other ideas above are good too.
Al