Coins: take a piece to earn what it's worth: pawn 1, knight 3, bishop 3, rook 5, queen 9, king 15. Everyone also gets 1 coin at the start of their turn.
Shopping: the shop opens while other players are moving. You see 3 items at a time and get a new 3 every turn, or pay 2 coins to Restock. Things you buy go in your bag. Tiles can only be placed on the three rows on your side.