Payouts are processed automatically every 2 hours. To get the payout you need to reach the payout threshold. For most of the coins, you could set it on the "Account Settings" tab.
Any rewards accumulated by a given cryptocurrency address may only be paid to that particular address. Wallet balances could not be merged.
2Miners mining pools: https://2miners.com/
2CryptoCalc mining profit calculator: https://2cryptocalc.com/