To dream of car keys represents feelings about your ability to start something in your life at w. Feeling the ability to control when a project starts or how long you will partake. Feeling in control of decisions or the manner in which decisions will be made.
To dream of losing your car keys represents feelings about being unable to start some area of your life. Feeling "ready to go" or strong enthusiasm to start a personal project that you can't do anything about. Something in your life is preventing you from getting started.