How long is the life expectancy for emphizima ?

Depends: If you are still smoking-it is a whole lot less than if you stop. Could be decades if you stop.

Depends: Emphysema can lead to death but the effect depends on severity of the emphysema as well as other illnesses. More commonly, emphysema just makes you more fragile - i.e. More likely to die from things that wouldn't kill someone who didn't have the emphysema for example.