I think lead gas by far for the reason the other person mentioned. Everyone got exposure by existing and breathing.
With other stuff, it depends on your interaction with it. Lead paint was and still is pretty safe unless you sand it and breathe it in which is unfortunately easy to do in that context, or it flakes off and you're a kid who likes the sweet tasting corn flakes made of wall.
These toys were probably fine if you had air circulation, didn't chew on your toys, and washed your hands before you ate. But there of course were kids who probably thought it was funny you could dent them by biting them...

