I have recently purchased an older home, and went to repair leaking flappers in all the toilets. When I went to shut-off the water at the shut-off valve at the floor, the toilets continued to run. How do I fix this? Also the hose bibs leak water around the handle when the water is on. These bibs are the frost free type.
On your frost free sillcocks take the handle off, where the shaft goes into the body of the faucet it should have a nut, tighten the nut about a quater turn. It should be fixed.
As for the supply stops, shut off the main water, replace the washers on your supply stops.