At the 'Neighborhood' screen hold Ctrl + Shift + C to display the console window and then enter one of the following codes without the quotes to activate the corresponding effect in the game.

Get 1,000 Simoleons:
Enter the code 'kaching'

Change Terrain Elevation:
Enter the code 'modifyneighbourhoodterrain on'

To be able to alter the neighborhood terrain by raising or lowering it hold Ctrl + Shift + C at the 'Neighborhood' screen to display the cheat console window and then enter 'modifyneighbourhoodterrain on' (without the quotes) and click over the area you want to change. To select a larger area click and drag the cursor to highlight the desired area and press '[' or ']' to either raise or lower the terrain and click, press '' to level the terrain. When you have the desired result type 'modifyNeighborhoodTerrain off' in the console.