Tappan oven is approx. 30 years old and oven door leaks heat?

Tappan stove is 30 years old and oven door doesn't shut properly and heat leaks out and stove top feels like furnace and knobs are melting and cannot be touched or else you will get burned. How to repair the oven door so it seals in the heat? Is this possible?
p spllman, March 2010
link Click here to see other fixes for Tappan.