Can you replace the question mark with the correct number in the below table sequence?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

What begins with T, ends with T, and has T in it?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

Can you identify if it's a murder or a suicide ?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

What word does this rebus represent?

meta meta
meta meta

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?