Why were the original wheels replaced in the first place? Was there a reason for it? Without knowing the entire story it’s difficult to assess blame. I would expect that he would’ve charged you for the used wheels. As for replacing the two tires that are ruined. If they were installed on the incorrect wheels for your car, the mechanic should be liable. But your alignment was off, and the used wheels were correct, then that’s on you. But they are your tires and he should’ve given them back to you. This all sounds very odd.
Not sure how that would necessarily effect tire wear. If you drove the car without incident or noticing any sounds, then they must’ve just barely have been touching the caliper and then only in rare occasions. You would’ve noticed some very noticeable sounds otherwise. Again this is odd.
Quite possible, but your car is of the age where these kind of repairs wouldn’t be unusual at all.
Again, why is he replacing the OEM wheels in the first place? And why is he buying used wheels anyway without consulting you? I wouldn’t pay for them and I would demand an explanation as well.
I wouldn’t pay for that.
Whenever a tire is replaced, you change the valve stem, this is normal.
You just said that he changed the oil & filter without asking. Which is it?
For 6 michelins , 7 wheels, an oil change, and a new wheel bearing/hub, That’s actually more than reasonable.
And you didn’t question this guy?
I’m sure he says a lot of things. Doesn’t mean you should believe him.
Mounting and balancing are usually a separate charge from the tires themselves. But you’ll have to pay it if you want the new tires to be put on your car. Alignments are never included, and will run around $140-$175 for a four wheel alignment at most independent shops. It’s recommended whenever you get a set of new tires, but isn’t a requirement. The customer has to request it.
Whenever you replace a tire, a new valve stem is used.
That’s a possibility, though I would be far more concerned with damage to the brake calipers.
You can use your own torque wrench and torque them down yourself, it’s not rocket science
That’s perfectly normal, a very common practice.