Start the game with "launcher.exe -cheats" command line.
During gameplay goto  console (press TILDE), 
then enter the following cheats: 

GodModeCora <0/1> - Toggle God Mode 
GiveMoney - Give Money To Player 
NoClipCora <0/1> - Toggle NoClip Mode 
BuyAllAccs - Buy All Accesories 
CheatRepairAllCarPart - ? 
CheatUseStamina - ? 

Press TILDE again to leave console.