How big is the gasket you are using. "I blew a head gasket on my Mustang, so I have to pull the heads and replace it/them."
Your question is REALLY vague. There are a number of gaskets on a car ,so you need to be very specific. Is it a head gasket,valve cover gasket,water pump gasket etc....
A radiator does not require a gasket so this may refer to a rubber mounting that prevents the radiator from jolts and damage.
The oil filter gasket is built into the filter itself, so just by changing the filter, you always get the new gasket.
Sometimes yes, sometimes no. It depends on - A) what type of engine and B) what type of gasket. Older cars mainly used cork gaskets, so gasket sealant was a wise choice. New engines use rubber, some with metal bushings or spacers, so the typical "blue glue" as daddy used to call it isn't required.
the same as any gasket to provide a seal between the two parts so no air or liquid goes in or out
Repairing intake gasket not preferred, you can use red silicone to seal it, but to do so, you must remove the intake, in which case, you may as well replace the gasket.
sadly u cant get another head gasket for an aztek so you can either get anothers head gasket and try to fit it in(try a gm kind) or scrap the car.if you sell the car you can only get like $900 from it so there is no point
if it is just a blown exhaust manifold gasket it can ruin your valves, so replace it correctly and make sure everything is clean before putting on the new gasket
Assuming you mean "valve cover gasket", the gasket seals the valve cover to the head so as not to leak oil.
The two may not be connected as a head gasket can fail at any time
sometimes it is very hard to find matching gaskets . but i personally stand by cardboard it lasts longer all u gotta do is cut the cardboard exactly the same way as the gasket get sum gasket adhesive an bolt in plac just thought i would try to help you . i know it may sound ghetto but hey i works