Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Okay before we begin with the puzzle, do keep in mind that you have to answer it quickly.

You are participating in a car race. Seeking the perfect moment, you overtake the second person in the race. What positions are you in now?

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

What am I?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

You see me once in June, twice in November, and not at all in May. What am I?

Can you identify the Oscar-winning movie from the rebus below?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?