Give yourself money. Directly set how much money you have. Buy anything you want, buy a house, buy clothes. There is no limit to what you can buy.
Select the amount of money you want all players to have then use the 'Set Money' button to apply it to all players. The max money you can have is 2,000,000,000.
Set all players money to the amount of money specified in the 'Set Money Amount' option.