Ahhh, poor little guy, that must be painful. Likely caused by them fighting, he's missing several toes/nails, and that's probably the result of a severe bite or many severe bites.
Do the Betadine soaks as stated and apply some triple antibiotic ointment a couple of times daily until you can get him to a reptile vet ASAP. He will most likely need prescription antibiotics given to him either orally, by injections, or both. If he gets to a reptile vet soon and gets the antibiotics to stop any infection, he should be fine and be able to use his leg again. Likely right now the pain is too much for him to use his leg. That's the other reason he needs to get to an experienced reptile vet asap, he needs some pain meds.
Please keep those two separate from now on, all the time. They cannot ever be together again, as the next time this happens it might be fatal.