#1 You're alive
Ummm... that's it - you think that your folks care about the car as long as you're ok?
Well ok, they'll be pissed off about the car, but cars can be replaced.
Anything that you walk away from intact should leave you happy, not empty mate.
I wrote off a friend's car in year 12 - flipped it onto its roof after fishtailing on a dirt road. The two of us got out, flipped the car back onto its wheels and drove back to school (damn 180Bs were tough). It was a shit, but I walked away. My folks (and the owner) were pissed off but it was only metal and plastic and being alive counted more.
So don't feel down over it at all.
Other than that - let your folks know how you feel about it all. Offer to pay their excess out etc.
But seriously mate - you're alive, that's what matters