In Azerbaijan, they use the Azerbaijani Manat and, approximately, 1 Manat = 0.50€
ATM and credit cards – In Baku, you can use your credit card pretty much anywhere and ATMs abound. However, once you leave the capital, it is better to bring cash with you. You may find some ATMs in smaller towns but you can’t really pay by card.
Money exchange – There many exchange offices around the country.
Azerbaijan is really cheap. In fact, leaving the fancy Baku aside, this is one of the cheapest countries you have ever been to.