Hi
If you are just coming for a holiday on a tourist visa there is not usually a requirement to show proof of funds. However, it does depend where you are from. Check out the MFA website http://www.mfa.gov.tr/visa-information-for-foreigners.en.mfa for your country. Many tourists can obtain their tourist visa on landing at your Turkish destination airport.

Which country are you a passport holder of?
You can check the Ministry of Foreign Affairs website at http://www.mfa.gov.tr/visa-information-for-foreigners.en.mfa for details.