Well first of all, you should get the notion that Teflon is some "highly toxic" material or some kind of significant health risk material out if your head, as it's not.
The only part that
would be toxic in Teflon is PFOA, which is a chemical used to
make Teflon, but isn't
actually present in the finished product (or if it is, it's so miniscule it's not remotely a problem), it can cause tumors if you ingest this chemical...but these days, most Teflon manufacturers don't use PFOA in their pans anymore, so it's a non-issue.
That said, there are things you shouldn't do with Teflon pans, but not because they're toxic, it's just to increase the lifespan of the product.
Firstly, you should never use Teflon pans over high heat. This will ruin the coating and start melting the plastic, which is bad (since no one wants their food coated in plastic, even if it is save to eat plastic).
Secondly is not to scratch them with metal utensils, as this will ruin the non-stick of the pan. If you have scratched pans, toss them since they're no longer useful (but not because they're suddenly toxic).
Thirdly, you shouldn't toss them in a dish washer, always hand wash as heat from dish washing can damage the material.
The only real concern with Teflon is what the chemicals used to make it can do to the environment if not disposed of properly by manufacturers, but using them to cook food is 0 problem at all.
I suggest taking a look at what the
ACS says, not sensational journalists/Facebook moms.