Welcome to our Forum, bombshell.
Carl has a page on the
Guide about cheats that may help you to get started with them.
When I wanted a car in Bridgeport, I used moveobjects on and placed the parking space on the terrace. It could probably also have gone somewhere inside the apartment. Then I bought a car, put it on the parking space, went to Live Mode and moved it into my Sim's inventory, then went back to Buy/Build Mode to delete the parking space. It worked great for me.