Well, go to World Builder in the Civilization V SDK program. (That program cannot be active, as you are playing the game.) To cheat with money, use the Scenario Editor at the top of bar to edit a civilization's money. To edit the building of a city, go under the Cities tab at the right hand side of the program to create and edit cities' buildings and whatnot. To add units, go under the Units tab on that same right hand side.