It would be very difficult and time consuming, maybe impossible. You can get a Lynx bus (Orlando area public transportation) at the TTC, but you'd have to figure out which bus to take to the restaurant you want to visit, and then hope that the bus stop is somehow near that restaurant. And the odds of that would be slim.
Is there a particular off-site restaurant you're interested in?
If you are considering this because you believe you'll save money by eating offsite, I would say that you'll never save enough to make the inconvenience worthwhile. Offsite eating may be cost-effective for those who have their own car with them, otherwise you'd need to rent a car, or get a taxi, and the cost of that would offset any savings on food.