I tracked down the tow company. Then I picked up Momoko from work. We went to the tow company. Momoko had to pay them $175 to get her car back. They buzzed me through the security gate. I started her car and waited for them to open the lot fence to get out. I ran over some car undercarriage as I exited.
We ended up dropping off Momoko's car at the mechanic right after that. In addition to an oil change, he fixed the outside weather temperature gauge in her car. He said needed to take the bumper off to fix the wire that runs the gauge. While picking up her car, I dropped my car off for an oil change myself.