Keep in mind that the offer they give you for a trade-in is given in the context of the whole deal, including the purchase price of the new vehicle and the financing/lease terms. So for example they might give you $1k off the purchase price as compared to the last guy they sold one to, but then...
They're in Poland, so it does make it a bit hard to go to an American junk yard.
Also, if you're the one who provides the template, you get the piece for free.
Profit margins on new vehicles are quite small. Profit margins on service contracts, extended warranties, etc., are very high.
By the time they get to the point of telling you the vehicle is crap and the extended warranty is a must-have, you're already emotionally committed enough to buying...
Had a fuel pump fail on a prior vehicle right after I moved to a new town. Being new to the town and not knowing any of the shops, I had it towed to a shop I had seen pretty close to our house. Shop turned out to be a pain to work with and the quote for the fuel pump replacement as relayed to me...
How do I do the reset?
When I was trying to figure this out for my XL, I had seen somewhere that the 94 is sort of compatible...to get it to physically fit there was a part that needed switched out; I don't recall exactly what but I think it may have been the battery tray?
I've rented from UHaul several times without issue. Their online system is familiar with the current Ranger and knows it can handle it. I'd guess that the guy you called thought you had an older Ranger and figured there was no way it could handle towing the 7.5k you were claiming.
Fuel in oil is generally a problem for people with short drives, but you've specified that you're a highway driver. Have them check HPFP and injectors.
I'm guessing they're having the OP bring it in so they can try things like new filters, nitrogen tires, etc, which they know won't fix the "problem" but which OP will be footing the bill for and making it worth their while.