I am not sure what you mean about a code!
Money paid to you goes to paypal and even after the 21day hold it still stays in your paypal account,just like a bank account. You can use it to pay for purchases or transfer to your bank account.
You have to do this it is not automatic,unles you enter bank details on paypal they don't know where to send money.
The details you enter on paypal are simply the Sorting code of your bank, a 6 digit number like for example 30-12-98 asin hetop right corner of cheque and the 8 digit account number. You then withdraw money from paypal and transfer to bank.
Youdo not need any internet banking.
Just look at the paypal page to find "withdraw money" and down the right hand side for bank details,which I am sure you had to enter when you opened the paypal account.
