Glad everyone is relatively okay after the wreck.
1) Its hard to say if the cr is repairable until you get someone to look at it.
2) It depends on what substructures, if any, where compromised in the collision.
3) Buying back a written off car and them parting out would be great for us here at the CEG (or eBay). The engine and tranny could even be put in a 1st gen Contour, Cougar, or even a Focus!

Interior engine, and extrerior parts should fetch some decent money. Maybe even more than your buyback price (maybe $4-5k)