Answer:
The answer to all three riddles is a library.
There is very old and there is very new keep objects safe inside. A library is a place where books, both old and new, are kept safe.
Around and around the numbers go until 3 numbers click. The numbers on a library's call number system go around and around, and the three numbers that click together are the ones that tell you where to find a particular book.
Books and paper are locked inside until I'm opened. A library is a place where books and paper are stored, and they are locked inside until someone opens the door.
I hope this helps you solve the riddles and open the locker!
Step-by-step explanation: