I've encountered those two words in a manga I'm currently reading. Here are the sentences :
I don't know if となら is a specific particle or if it is と+なら(ば) (and in that case is と related to まちがう or 勝てる?)
I suspect とやら is related to the やら particle and has a meaning close to など... but I have seen somewhere that it is equivalent to one of the uses of the quotation marks in english. Like : You pissed on the rug again! - No I didn't my love, it was the dog! - Right, "the dog"...