Your parents are right for telling you not to smoke! Smoking is disgusting, a hard habit to break, and can absolutely wreck your health.
But otherwise, I know where you are coming from. In cultures where children move out of the parents' home, there is almost always a falling-out, and that's what you're witnessing. In other cultures where the child stays with the parents indefinitely, this falling-out doesn't exist. Why? The parents want to feel like they are still a force in their children's lives, but they know they have to pull away and that their force is diminishing. You are simultaneously going to try your wings, make your own decisions, and struggle against their power.
I am 19 and I don't get along with my parents. I speak to them less than once a month if I can manage. Why? My mother is mentally ill and has always acted irrationally towards me and my father has let it happen. When I turned 18, I wanted out of my house immediately but I was still in school and so couldn't leave. You will be victim to the same situation ... as long as you are in high school, I'm sorry, but they DO have power over you. So you should stop rebelling for now. And stop smoking for your own good.
Are you moving out as soon as you graduate? Are you going to college? If you go to school, you will be considered their dependent as long as you are a student! You will still be under their insurance and claimed on their tax forms. Whether they give you a penny or not, their income is what your scholarships/financial aide will be based on.
I don't think, based on your post, that your parents are that bad. I think you are making ridiculous choices, like smoking, just to rebel against them. RETHINK your decisions. Rethink your friends. Rethink cancer in 20 years. Do you really want it?
New experiences come all through adulthood. You don't have to try everything your friends do. Weigh consequences.
Good luck!