If you are planning to travel to Turkey, you will need Turkish Liras (TL). You can check Turkish Republic Central Bank’s daily exchange rates here
It is cheaper and easier to exchange your money to Turkish Liras in Turkey. There are many currency Exchange Offices (Döviz Bürosu) at the airports, touristic places and shopping malls which offers no commision money exchange. Most banks may charge a commision and exchange offices at the airports usually offer lower rates of exchange.
We recommend you exchange a little amount at the airport which will be enough to get you to your hotel and run to an Exchange Office to exchange the rest of your money.