sorry to hear of your accident , i know how you feel as i've only recently got mine back from the bodyshop.
DO NOT TRY AND OPEN YOUR BONNET you wont close it again
you will probably be going through your insurance as you're possibly looking at circa £5k to repair using new parts,
i believe the gas charges for the bonnet are £1500 each,then you need
a headlight , a pressure tube maybe needed, airbag module to be replaced or reset,
a set of bonnet hinges & radar re-calibration if its fitted to the car
it will be more if you need a bonnet, bumper & a radiator pack
if i can find some prices i will post them here for you
member Shada will give you a better idea as they repaired their own IS300h front end