Which word does the below Plexor means ?

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

What is the fastest way to double your money?

The cream is heavier than Milk. True or False?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

What seven-letter word has hundreds of letters in it?

John decided to give his bike 3 coats of paint. Which coat would go on the first?

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

I know a nine-letter word having only one vowel.
Do you ?