Bring up the cheat window during gameplay by pressing Crtl + Alt + C and type one of the following codes (without the quotes) to activate the corresponding effect. To exit the cheat window just press Crtl + Alt + C again.
People At Peace: Type the code 'Concordia'
Unlock ALL Buildings: Type the code 'Number6'
$100,000,000 City Life Bucks: Type the code 'Midas'
$100,000 City Life Bucks: Type the code 'richgirl'