Copper Head 
As a Lionel train aficionado, and a low-level expert on these things, the tin cars you are talking about are what they refer to as "pre-war" meaning they were made before WWII. Unfortunately unless those cars are pristine collectors don't place much value on them. Check evilbay for recently sold similar items to see what they are going for.
There are a lot of windup locos and they ran on the same tracks as the electrical trains. You would probably be best selling as a lot on CL.
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