Find the directory in the game folder “… / data / interface / panels / console /” and open the file with Notepad console.lua located in this folder.
Cities XL: Code (money) [PC / X] Free Download
There you will see many different names, use the built in notepad search to find the lines:
function CONSOLE.GimmeCash
a little below will be the line:
_nb = _nb or 400000
replace it with
_nb = _nb or 1000000
Then we go into the game, hold down the keys [Ctrl] + [‘], push [Enter] and enter the code gimmecash