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?
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).
Develop games in your browser. Powerful, performant & highly capable.
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