In terms of car related things that scare me, mold is one of the worst. Remediaton is difficult, and if you don't get 100% of it, it just comes back. It really isn't safe to be working around it without proper precautions.
Is there any way you can remove all the soft materials and throw them away? The source must be removed to correct the problem.
If you are dealing with hard surfaces only, the task is greatly simplified. Heck, even Lysol will handle mold plus lots of other stuff you probably have sitting under your kitchen sink.
Microban seems to be the product the professionals reach for. I suspect you could find it at a janatorial supply, maybe Home Depot, etc...