I was buying Snap-on tools in 1976 and I don't remember my tool guy handing out cool mugs like that. All I ever got was a crappy pocket screwdriver with a magnet on one end. Probably still have one or two.
Hard to put a price on them. Being plastic, they are going to degrade once exposed to the light. Maybe $20 a case of 4, plus shipping? There is a set of six Chevrolet mugs that look similar for $25 on ebay:
https://www.ebay.com/itm/Antique-Che...YAAOSwz9xgF2I5
Harder to value the glasses. I bought a set of Chevrolet glasses from a member here a few years back. Four glasses, with different cars depicted on each, Corvair, Nova, Chevelle and Full size; all in similar gold , with a gold ring around the top. I can't for the life of me remember what I paid. $60 comes to mind, but could be way off. I would think your Snap-on glasses would bring a little less for a set of four, as they are all the same, not a set of four different ones.
But then, I may be off my rocker too.