and the type of transaction, but if you're just starting out you might consider using PayPal. This company is one of the biggest third-party card processors in the business, and they've won many awards for their service. PayPal processes millions of online card transactions a week, and they have a good reputation for security.
You'll need to set up a PayPal account, but that's very easy. Additionally, you'll need a bank account in the name of the business that's trading - PayPal will not transfer funds to an account that's in a different name to that which is registered with them.
On the PayPal site you can generate 'Pay now' buttons - separate ones for each product line - and the whole process is quick and painless. You specify the currency that is to be the 'prime' account currency, and PayPal will auto-convert all other currency payments for you.
click here to visit PayPal's UK site.