How much to have false teeth wired in?
I have really bad teeth and I'm only 20. Because of a poor childhood I never had braces, so even though I've been taking care of my teeth their crookedness has caused a lot of problems. I have many cavities and my teeth are so weak they crumble away. I'm scared that I'll be missing a lot of teeth by the time I'm 25 
How much would it be to have false ones put in? And would it be worth it?
It depends on the dentist you go to. I am in the same predicament as you. I have very weak teeth, have had all my life. No amount of dental care could help that. I am 34 and am fixing to have partials put in. It is costing me 1800.00 to have ALL of my molars pulled and my partials made. I am keeping my front teeth so I do not need full plates…..yet. I am guessing about 3000.00 for full plates.
Personally, being in the same boast as you, I believe that it would be worth it to not have pain when you eat.