Select 'Cheats' at the 'Main' menu and enter the following case sensitive codes (without the quotes) to enable the corresponding effect.
Unlock 10,000 Gold:
Unlimited Flame Cells:
Unlock ALL Weapons:
To open the console, go to the "base" folder located in the installation folder of Rage and open the default.cfg with a text editor, then put right under "unbindall" in the upper Area "com_allowConsole 1" (without quotes), save.
Now you can open the console by pressing the tilde button during gameplay. (the location of the tilde button may vary on what keyboard or language settings you use)
Here are the console cheats:
CvarAdd g_permagodmode 1 = Godmode
CvarAdd g_infiniteAmmo 1 = Infinite Ammo
CvarAdd vehicle_god 1 = Godmode for vehicles
CvarAdd vehicle_infiniteBoost 1 = Infinite Boost for vehicles
CvarAdd vehicle_enableAllUpgrades 1 = All Upgrades for Vehicles