Turkish uses a Roman alphabet. It has 28 letters: 8 vowels and 21 consonants.
Now for where the difference is with the English language letter pronounciation.
First off, every letter is pronounced.
C sounds like 'j' like jam.
Ex: Names like Canan, Cem, Can are respectively Janan, Jem, Jan (more like Jahn)
Ç sounds like 'ch' like chair.
Ex: Çok means 'so' or 'very' and ıs pronounced chok.
Ğ does not have a sound, it elongates the letter preceding it.
Ex: The name Buğra is pronounced Booooora.
I/ı sounds like 'uh' like 'Make 'em say uhhh, uhhh. Na na na na.'
Ex: Hayır means no and is pronounced h-EYE-uhr.
Ö sounds lıke 'ur' like further.
Ex: The name Özge is pronounced 'Urzge' kind of but not so much r and a slight o before the u...
Ş sounds lıke 'sh' like shank.
Ex: Şerefe means cheers and is pronounced 'Sheh-reh-feh'.
Ü sounds lıke 'ew' like in 'few'.
Ex: Lütfen means thank you and is pronounced 'Lewt-fen'.
That is all I can give you, friends.