Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

What does this rebus puzzle means ?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

What can jump higher than a building?

I left my campsite and hiked south for 3 miles. Then I turned east and hiked for 3 miles. I then turned north and hiked for 3 miles, at which time I came upon a bear inside my tent eating my food! What colour was the bear?

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

10+10 and 11+11 can give you the same answer.

Explain how?

What number comes next in the series?

5 15 5 18 5 24 14 20 _