It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

What number divided by 4 is the same as that number minus 4?

John was drowned by he was not wet. How?

What always comes into a house through the keyhole?

I have an eye but still cannot see.

Who am I?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

Vin Diesel is pulling a theft and has planned to run away with all the cash kept in the safe. But the only way to open the safe is the 13 character password. He has a set of five clues given to him by a trustworthy source.

Exactly two of the below statements are false.
The password is contained within this sentence.
The password is not in this hint.
The password is within only one of these statements.
At least one of the above statements is a lie.