Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Who always enjoys poor health?

John was piloting a plane behind a car but was never able to overtake it. Why?

Take one out and scratch my head, I am now black but once was red. What am I?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

I am sure no one can have two things for dinner. what are they?

Detective John was investigating a murder in China.
It was a difficult case, and John was completely stumped until he noticed a message sent to him by the killer cunningly hidden in a newspaper advertisement selling Car Licence Plates.
Detective John thought about it for a while, and when he had solved the puzzle, immediately arrested the guilty man.

Q1) How did John know the advert was a clue for him?

Q2) Solve the code and tell me who John arrested.

This is the newspaper advert (Car licence plates for sale) that Detective John saw.

Plates For Sale;

[W 05 NWO]
[H 13 HSR]
[O 05 EBM]
[D 08 UNE]
[U 10 HTY]
[N 04 BRE]
[N 16 TTE]
[I 26 LHC]
[T 10 AEE]
[I 26 CNA]
[X 22 VDA]