blizzle,
Welcome to the gym.
Too young: younger than 18.
Too old: never. There are hundreds of 60+ men that have used PE to change their sex lives. In fact, PE is probably best for older men because it keeps the penis in shape, and thus harder & healthier.
You have a lot of questions about devices, which is good. But before you jump into the devices, I suggest using just normal PE exercises first. In which case, start at our free PE guide:
http://exercisingthepenis.com/new/fr...eginners-guide
Good luck. If you have any questions, let us know. Me or one of our great members will be glad to help.