As young Link, you can go to a Mask shop in Castle Town. The Mask Salesman will borrow you various masks. I will explain all steps to get the Mask of Truth
- Get the Keaton Mask
- Go to the Soldier at the gate to Death Mountain
- Get the Skull Mask
- Go the the Lost Woods and find the Skull Kid
- Befriend the Skull Kid with playing Saria's Song
- Give him the Skull Mask
- Get the Spooky Mask
- Give it to the Kid in the Kakariko Graveyard during day
- Get the Bunny Hood
- Optional: Get the Giant's Wallet for maximum Profit
- (Complete Jabu Jabu's Belly)
- Go west of the Lon Lon Ranch and search the Running Man at night
- Get your wallet filled to the maximum from him
- Now you are able to borrow the Mask of Truth, Gerdu Mask, Goron Mask and Zora Mask
With the Mask of Truth, you can listen to Gossip Stones, the other masks only give comical reactions when you talk to people.
