It could.
It could, if the old gasket had failed.
The antifreeze in the oil is a dead give away that the head gasket is blown. Make sure you send the heads out to be checked so they are not warped.
A cracked block means that the engine itself is cracked. A blown head-gasket means that the gasket between the engine and the head has blown. Either can be caused by overheating the engine. When an engine overheats the head can warp causing the head-gasket to give out. In some engines the heat cracks the block. If the block is cracked, it's over. If the head-gasket is blown you can always machine the head surface and put it all back together.
No fuel, blocked fuel line or filter. A faulty airflow meter or map sensor, a blown head gasket, blown rings, blow by, incorrect fuel in tank IE: put petrol in diesel van. Sorry for rough answer but you didn't give much away in your question. The make, model or circumstance that van stopped working etc..
You will need a head gasket replacement if the head gasket has blown. Have a professional check it out. You did not give enough information for me to say one way or the other.
are you sure its just a blown head gasket?... if heads are warped due to overheating replacing the gasket wont help you will need new heads as well. You can get a Haynes Manual or Chiltons, they will give you step by step guidance on replacing your gasket.
No it does not give you better gas mileage, all it does is helps with any loss of horse power and white smoke coming from the tailpipe due to burning antifreeze.
No the reserve fuel is to just let you know you are in need of fuel and to give you time to get it with out running out of fuel.
I doubt that a blown head gasket would cause you car to shut off without some other symptoms prior to it stalling. I would suspect a bad fuel pump, or clogged fuel filter. It can be many things. It takes three things for an engine to run. Fuel, Air, & Ignition. Find out which one of these you are missing and this will give you a clue as to where to look.
Depends, if only the gasket is blown. The head may be warped or cracked. Hard to give you a price because it also depends on where you live and who does the repair.
The fuel mileage of the new cars far exceeds that of the older models which makes them more economical to drive.
The gasoline that is recommended by the manufacturer is the best fuel to use.