Jane hot wires an old SAAB 99, but that particular model has the ignition lock between the seat and not next to the steering wheel where Jane does in this episode.
The encrypted USB drive will supposedly delete it's contents on entering an incorrect password twice. As an IT specialist, it should have occurred that you can clone drives bit by bit, making an exact duplicate, and attempt to guess or brute force the password on as many devices as needed. There is no encryption or security that can be physically circumvented with enough time and patience.