Mary, I bought a remote starter switch because of Dave Neptune (it is always his fault when I buy something new for the engine)
Looks like you've received good advice above. I love my starter switch for when I am working on the motor alone. I'll reinforce Bill's comment. It is easy when your head is in the engine compartment to forget about the key. Only have it in the ON position when you are ready to start the motor, and if you are troubleshooting something & it is stalling out on you, don't forget to reach up and turn the key OFF, so you don't burn up ignition components like the coil.