From the "Royal Bonus" expansion, Fauns receive one extra token for every region they conquer. However, they also give their opponent an extra token, making up for the one they lost in the Faun's conquest, unless they're Elves, in which case they get an extra token (unless there are no more Elf tokens in reserve)! The extra tokens are received at the redeployment phase for the Fauns and the opponents receive the tokens after the Fauns turn is over.
Fauns get 5 tokens initially.
There are 18 Faun tokens in the box.