Hi, the Tetanus shot will only cover for Tetanus, and tetanus comes from dirty soil, or items, it cats. You only need antibiotics if the wounds become infected, which they can since the cats mouth and teeth carries bacteria and can cause infection. If you see infection, or pus in the wounds, or if you develop a fever then you need to take antibiotics. I would be really concerned about rabies tough, because this was a feral or wild cat, and you don't know it's history. It probably doesn't have any up to date if any vaccinations so could be carrying all kinds of diseases, including rabies if its been In contact with other wildlife outside? Since the history of the cat is unknown I would see your doctor, and see what he says.
Is there any way, you can catch the cat, and take it to a vet or animal control facility, so they can quarantine him to watch for rabies? Please go to your doctor to see what he suggests. Keep us posted. I hope your okay