If by "toy" you mean R/C aircraft, that's usually not even gasoline, but a mix of methanol and nitromethane, no lead in sight (and these days you'll find a lot

If by "toy" you mean R/C aircraft, that's usually not even gasoline, but a mix of methanol and nitromethane, no lead in sight (and these days you'll find a lot more R/C stuff that's battery-powered instead). But when you move over to the general aviation world, yes, leaded gas is still the rule rather than the exception. While 100 LL has less lead than the older 100/130, it still has far more than even now-phased-out leaded auto gas. There are some aviation diesels that run on jet fuel, but they're few and far between (and sometimes vaporware), and aviation engines certified for auto fuel aren't very common, either.