Hot answers tagged vintage
The red car that you mentioned is Mail Van (7820). There are a number of other trains in the picture including: 7730 - Goods train (the locomotive doesn't seem to be visible) 7710 - Push-Along Passenger Steam Train (just the cars) 7750 - Steam Engine with Tender (pulling the cars from 7710) 7814 - Crane Wagon 7760 - Diesel Shunter Locomotive ...
Those would be Waffle Bottoms, which seem to have been mostly phased out by 1969, except for the 4x8 plate that went until 1971. Having not read any deep history on old LEGO designs, I'm going with that was just what they went with to start, then realized that the tubes were much better.
The set(s) in question are likely two versions of set 1210 Small Store, released in 1955, or 210 Small Store, sold in 1958. They were available in a number of languages and with a variety of store names. "Tabak" means Tobacco in both Dutch and German. The Dutch word for bakery, however, is "bakkerij", while in German it is "Bäckerei". "Bakerei" is only used ...
BrickLink or eBay. You could get significantly more if you go through the lot and separate out full sets then sell them on BrickLink. But if you don't have the time at least take a lot of really good pictures - in this case an eBay auction would be the better choice.
ATC is the Asahi Toy Company from Japan. Here are the pages from their 1971 catalog showing some of their construction sets:
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