I know alot of people that have been soken since age 13. including my own parents. im curious what is the average age people die for smoken that long?
i know alot of people that try to quit but they can't.

There isn't really an 'average' that you can pin -- it does knock a few years off your life but since we don't know everyone's technical life expectancy right off the bat, we can't really say "well you're gonna die round 70" because some people live to be 100 and smoke every day of their lives and other people die of brain cancer at age 40, and never smoked and never lived with people who smoked.

Best thing you can do for your health is to make sure your doctor knows how long you've been smoking so that he can monitor you for developing lung problems.