I tested these with a 9 Volt Battery and couldn’t get them to run. But I don’t really know much more about them or how to fix them.

Pics #2-7 Contain the working cars (as tested by a 9-volt Battery.) Should be 18 total working and 21 non-working

Quite a few of these need new tires, and cosmetically some are better than others. Let me know if you need additional photos/info