A/C draining in the floor instead out outside.

That means either the case is broken or the drain is plugged. You will have to locate the drain under the car and clean it out with either a coat hanger or compressed air. Don't be too rough with a coat hanger or you could puncture the evaporator.

Where is the drain line located under the car, I can't see any specific line any where?

It will be a small round pipe protruding through the firewall. They can be difficult to locate on some cars.