Car starts without key!

You can buy 'em at parts stores, or if you have a junkyard nearby..................

Can you solder? You can just take a dome light bulb (example)

1004 is dual contact, solder wires carefully to each of the two contacts, leave the base unconnected

1003 is single contact, get one with a brass shell (yellow color) and solder a wire to the shell or clamp a wire there with a fuel hose clamp, and solder a wire to the contact.