Insurance question!!!

[Sack Attack]

My girlfriend wrecked her jeep teusday, An old man pulled out in front of her, he admited fault, his car (buick) and her jeep both had to be towed from the crash site, I understand that it is the insurance companys decision on if her jeep is totaled or not, but what I'm not understanding is this....

The jeep is leased, for 4 years, we had full intention on buying it at the end of the lease. The jeep is an 04, we had it 3 years and still had 1 year remaining on the lease, it has 70k miles, we were allowed 48k miles on the lease agreement, we went way over which was the reason we decided to purchase instead on turn it in and pay them a lot for mileage penalty. The question im having is being an 04 with that many miles, if we decided to turn in it and pay the diffirence because of the miles, the dealer will not take back a previously wrecked car, yes or no? I dont know anything about the whole thing really, so hopefully they total it, (it dont look totaled to me) so whats everyones opinions on this?

and YES we have gap insurance

also, the airbags DID NOT deploy....she hit the fuck out of him and no airbags...whats up with that?