WHAT WRONG? No lecture$. LHF brakes metal to metal week+ Today pedal goes to floor No brake power until almost bottom out Fluid not low?

05 AWD Ford Freestyle. Besides grinding all around brakes were fine. Now noise is close to negligible. Replacing Front pads/rotors tomorrow. A must to bleed now? Air in system? Caliper?

The calipers have reached their maximum travel and thats why you don't have any pedal left. Its very likely that the rotors will have to be replaced also. Theirs no need in bleeding the calipers if they haven't been opened up and let air in. They will be hard to get collapsed far enough to get the new pads over the new rotor, use vise grip "c" clamps and it will make it a thousand times easier. Don't rush it when collapsing the calipers with the "c" clamps, just work with it and it will go.It takes a lot of pressure to do this. If you have added brake fluid in the past, you may need to take the top off the brake fluid reservoir and drain some of it out to keep it from overflowing when collapsing the calipers… HOPE THIS HELPS.

Possibly a leaking wheel cylinder. So something that has to be fixed as well
Could have just happened(kind of like a balloon popping… One minute a balloon, next second nothing.

They will see it because it is so obvious. So it may be a back that blew. So surprise, surprise it has to be done.

Sounds to me as if you shouldn't even try to play mechanic!