They vary as with all products but the shell citicard for example has an online screen which is presented exactly the same as a bank statement, it shows recent transactions, and a balance.
The only difference is that the balance is a bad thing, as its a balance due to them. The payment dates are very clearly listed, along with calculated interest if you do not pay by the date, etc etc. With the card you have 2 dates, the bill date at which it cuts off the transactions and generates a balance due by your payment due date which is around 2 weeks later.
To pay it, you either setup an automatic direct debit, or do what i do which is have my credit card set up as a payee on my banks online banking. A few clicks in there and its paid. Then a couple of days later the payment shows on the credit card online banking screen and the balance drops by the payment amount.
Easy as having 2 bank accounts really