Do you just want checkboxes and radiobuttons.??? No other functions???
Okey... since I speak another language as mother tongue, I'd advise you to look up: Help -> First Steps -> Learning Programs/Tutorials or anything like that in your LiveCycle (it's in your mother-tongue). (Would be a blame if I'd tell you something wrong due to language problems,)
The fist form they explain there already contains checkboxes and radio buttons. Just do it in your form, as they explained it there 🙂
You'll be through in just some minutes...
If I misunderstood you, plz specify your problem 🙂