Age doesn't really matter, mate!
Unless you're terrifically old and have terrible joint mobility, but even then one sees senior citizens practicing Aikido or even Judo, so what's stopping you?
Chris is spot on. Don't listen to silver-screen martial arts movies too much, or the urban legends/myths around Kung Fu. Yes it's nice to be able to start at an early age, but it's definitely not a prerequisite. Kung Fu is an umbrella term for a family of Chinese martial arts, and each differs quite wonderfully. If you're worried about the time it supposedly takes to learn Kung Fu with respect to your age, all I can say is that the journey's a reward in itself. There's nothing quite like personal growth and hard work won by repetitive training over the years as you find in the martial arts. Kung Fu, literally means "Hard Work", so go figure!
"With Taijiquan you'll be able to walk out the door in ten years. With Xingyiquan, you can kill a man in three."
Yeah I will definitely take your advise and I really appreciate them. I have researched about Kung Fu but it is quite nice to take advises from the actual practitioners so thank you, guys..