Is Oakcliff, Atlanta public transportation-friendly?

Yes, but depending on where you are coming from in Oakcliff, you might have to make a little walk to the nearest bus stop (maybe half a mile or so). Once you're at the bus stop, you're basically MARTA accessible. Check out http://www.itsmarta.com and enter in your A to B destination info. and it will show you the specific details of your commute. Good luck!