It is well known that where there is nothing there is a vacuum. How is this possible, as we have gas all around world and it is the job of air to fill the empty spaces. So why doesn't air get dispersed and fill those places?

Does a vacuum create pressure? If yes, why is there no pressure between molecules of gases or any other place like outer space? And if no, then it is lengthy! If we start emptying a tumbler it creates pressure (low pressure area), and then why would the tumbler have no pressure at all after ejecting all the air from it?

Please correct where I have gone wrong with an easy-to-understand answer.