Are you in the states now? I must say, getting the visa in Japan was a joke. I only went to the Embassy once, and I didn't even have to then. I showed them my last 3 years of tax returns and that was it. No interview.
I would assume you would include:
-Liquid assets (your bonds, any mutual funds, and of course, savings)
-Not so liquid assets (car, as you've stated)
Probably not a good time to bring up any lingering college loans or credit card debt.