With the help clues provided in the image, can you find the 5 digit key?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

Can you identify the famous TV character from the rebus below?

What will you call your mother's brother's brother-in-law?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?