It's been a while, but I took a couple of years of Italian in college.
The standard Italian pronunciations of the letter C

Ci = ch as in Ciao bella! say it like "chow" in English
Chi = key as in Bianchi, say Bee-on-key
Cc - depends what follows, ie: Gucci has ch sound. cc with i or e following sounds like this

With a, o or u will make a k sound. Can't think of a word right now like that.