I push the clutch, it goes all the way to the floor. What's missing? on 1997 BMW 318i

The car will start if I push the clutch all the way to the floor, but will not start if I have my foot off of the clutch. Once it's on, the car seems to be in neutral and cannot move to any gears due to the fact that the clutch has nothing

Asked by for the 1997 BMW 318i
brake fluid in the cluch slave cylinder,or the cluches master cylender is bad