Talking from experience i wouldnt claim for your own car.
As from what you have said, IF you want to keep the car, it doesnt seem like a right off at all.
And IF it only done that damage to the other persons car, just pay for that to be fixed, and fix your golf.
Bumper, grille, bonnet needed, Maybe the lock to hold the bonnet down. Sounds like a perfect chance for a vento front.