My question involves criminal law for the state of: Florida

First off I know I was incredibly stupid to do this in the first place. Never again will it happen either. This was my first offense and I have no prior record by the way, but I am 16 years old and I was in walmart and I took about $15 worth of makeup and put in my purse. What I didn't know was one of the undercover walmart cops saw me do it. So as I was walking out a lady and two other guys stopped me and took me into the security room and told me to give it back and I did. Then they called my mom. When she got there they told her they weren't calling the police because I cooperated with them and was polite. But they were going to serve me a civil suit. They said each item I stole will be a $250 charge so does that mean I am going to be charged $500 for $15 worth of makeup? Do I even have to pay it? Also they said I would have to appear in court. Does that mean an actual court with a judge and jury? Any help would be greatly appreciated. Thanks.