Johnny Lightning is a brand of model cars originally produced by Topper Toys, similar to the hugely successful Mattel Hot Wheels die cast racing cars. Their claim to fame at that time was that they were extremely fast compared to other brands of die-cast cars. Their most important technology was to mold in a small hook under the front axle so that they could be propelled by a lever-driven catapult, far faster than could be obtained by either gravity, or battery powered "supercharger" devices. Topper closed in 1971 and production of Johnny Lightning cars ceased for 23 years.
Johnny Lightning (now a subsidiary of Playing Mantis) is a company primarily known for their die-cast collectible cars. They have also produced several small plastic representations of Star Trek vessels, entitled "Legends of Star Trek", since 2004.
What's it worth? Take a look at this Johnny Lightning price guide: sold listings for a value indication.