Im VERY suprised the airbags went off with such little damage to the front end.
When I crashed, my front end was ripped clean off including damage to the radiator... yet none of my airbags were deployed. Seems you've been very unlucky. Your seatbelt pre-tensioner has probably blown too which will need replacing.
As a rough idea... a new bonnet, bumper, light cluster, radiator, arch liner and wing cost £3500 using genuine renault parts for my 182. This included spraying all the listed parts.
With the airbags deployed and the relative low value of the car in todays climate, I suspect you car could be a CAT D write off.