Is it my timing belt on 2002 Kia Rio?

About a week ago I was driving and all of the sudden my car started to have acceleration problems then I heard a loud pop and my car started to ride funny I pulled it over and turned it off and then it would not start back up just makes a click. Alot of people are saying timing belt. I don't know anything about cars and I wanted to know if that's what it does sound like and what the costs to repair on average.