Carb Problems, Need Help

2nd and 3rd, the flapper in my air cleaner is apparently missing and the choke works but is manual and to be honest i dont know how to really use it!! lol please dont laugh to hard at me!! i just leave it wide open, maybe thats why it is skrewed up!! ive alwys had electric chokes on my cars! so any info on how to use it would be great!! and once again please dont laugh tg