How far is Canada from New York driving?

I need to replace my spark plugs and I’m confused about all the options. What is spark plug thread size and how do I find mine?

I recently bought a used car with leather seats, and for the most part, they’re in good condition. The only problem is the previous owner used to smoke, and there are a few cigarette burns on the driver’s seat. How do I fix the burnt leather?

I've had my eye on a brand new Toyota Supra, but before I pull the trigger, I want to make sure I'm getting the most value for my purchase. Do new Toyota cars come with free maintenance?