These are the currencies in Kiko Run: 

a. Diamond: You can use Diamonds to Revive, open Gacha, shake Gacha, and buy Coins in Shop menu.

b. Gacha Coin: You can use Gacha Coins to open Gacha in Gachapool menu.

c. Coin: You can use Coins to upgrade your Friendship level, buy Daily Item in Shop, open Gacha, shake Gacha, Revive (if the Ad isn't showing up or there's no internet connection), Pre-Run PowerUp and Supercar.