Cars?

You can find cars in debug in build/buy mode.
First open the cheat box  by using ctrl+shift+c
Then type in testingcheats true
Press enter
Then type in bb.showhiddenobjects
press enter
Type in bb.showliveeditobjects
press enter
Then type in debug in the search bar in build/buy mode
You can then look through the items to find cars

AG8291​ Another way to place a vehicle on a lot without having to use cheats is to use one of the toy cars and upsize it using the bracket key.  

Hope this helps.