There is a $ sign top right
Will take you to this
You will have to transfer to Sports, then go to My Account
Then you will see your withdraw button
To answer the OP's question: no, you can't withdraw without depositing and playing through a minimum amount. Source: I tried before.
First you have to make a deposit, for example, if you want to withdraw money through NETELLER you first have to deposit with NETELLER, then NETELLER appears in the withdrawal options at the ATM
No, you cannot withdraw without a deposit! And you still need to win back the deposit!