2. Yes. Selling a business will not absolve a sole owner or corporation of liability.
3. Bankruptcy will not wipe out the judgment.
Before you jump to any conclusions, be sure that you are actually in violation of the ADA. Check with an attorney in your area, but it may be very well possible that you are not.
The ADA is federal law, not state so it will not matter that you are in Florida versus California. The guidelines can be found here: http://www.ada.gov/adastd94.pdf
5.4 Dining Areas. In new construction, all dining areas, including raised or sunken dining areas, loggias, and outdoor seating areas, shall be accessible. In non-elevator buildings, an accessible means of vertical access to the mezzanine is not required under the following conditions:
1) the area of mezzanine seating measures no more than 33 percent of the area of the total accessible seating area;
2) the same services and decor are provided in an accessible space usable by the general public; and,
3) the accessible areas are not restricted to use by people with disabilities. In alterations, accessibility to raised or sunken dining areas, or to all parts of outdoor seating areas is not required provided that the same services and decor are provided in an accessible space usable by the general public and are not restricted to use by people with disabilities.