Depends on what engine it is. You can bet you have done some serious damage. Probably enough to make it not worth repairing. You will only know for sure by opening it up and looking at all parts.
That depends entirely on how much you value the car.
A few things you have to look at- How old is the car? Except for the bad head gasket, does the car operate OK? How many miles are on the car?? These are things you have to decide what you will do.
It depends on the year, make, model, mileage and general condition of the vehicle. Consult a trusted mechanic.
If it was removed then YES.
You must replace the defective gasket. There is no other permanent fix.
No
yeah depends on miles the car is rare hard to get ahold of
It would solve the head gasket or a cracked head. Sources: My dad.
Intake and exhaust manifold gaskets are also replaced along with the head gasket. Head is inspected and if cracked it is replaced. Head bolts should also be replaced with new ones.
General condition of vehicle? Can you replace vehicle for the amount of repair? Do you like vehicle?
Neither. Have a new head gasket installed. That is assuming you did not completely ruin the engine by continuing to drive it after the head gasket blew. If you did indeed ruin this engine, then the decision should be based on what the car is worth in the first place.
A used head gasket is not worth anything, because it cannot be reused.