How to use the wrists in the golfswing.

Depends what point of reference you take in the swing and where the rest of the body is positioned.

For example: If you take an 'old school' follow through where the toe of the club points at the sky on the throughswing when the shaft is parallel to the ground..... have the wrists had to roll to get to that position..... if the hips have opened and the shoulders are facing the target what roll has occured?

Yes the club would appear to have rolled when viewed from 'face on' but in reality it hasn't, it's just that you're now viewing the clubhead from a 'side-on' view... and it's raised from the ground.