Some of them look like fowl pox, on the combs, a few look like pecking injuries. Usually you don't need to do anything about those, they will resolve on their own in a few weeks. The scabs will darken and fall off, there may be a pale spot there that will eventually fade and disappear. The legs could be pox, or could be insect bites. If they are superficial and not open I would leave them alone as well, if they are oozing or bleeding or open, I would either dab them with a bit of betadine, or apply some plain triple antibiotic ointment to those spots on the legs and feet as needed. You can use a q-tip, I would use a separate one for each bird as needed since it could possibly be pox, so you don't inadvertently spread it, the scabs can spread it. Pox can affect any of the non feathered body parts, combs wattles and faces are most common, but it can affect the legs and feet, just less common, anywhere a determined mosquito can get to.
