Let's say I have a game made on the free license can I export it in html5 and then in the apk file and put it in google play?. And rasprostronyat as free?
And can I insert ads out there and purchase through google play?
Develop games in your browser. Powerful, performant & highly capable.
No, you'll need a license to export to Android (using 3rd party to build your APK), and to monetize your game in any way (including ads).
You can not make money in any way off your games made with C2Free
You should go over the Licensing page https://www.scirra.com/store/licensing#license2