Coins: Startbonus 250 coins, collections: 600 coins every 8 hours (for collection times check this) = 5650 coins in total (coins from quest or cinema not included).
Copper #868 we need 975 coins to get it.
Explosive #334 we need 3500 coins to get it.
Dark Commander #1101 we need 7500 coins to get it.
The number of coins you need will increase if you buy out the fields with claws with coins instead of doing the fights.