Brake fluid & oil are very different substances, for a clutch slave to blow & leak you'd be looking at the weep hole at the bottom of the bellhousing for brake fluid drips.
It's hard to tell from a distance what's happening, with no clutch pedal action at all you shouldn't be able to "force" it into gear with the engine running unless the car was rolling.
Might try bleeding the clutch system first to get a better idea what's happening. Clutches themselves can give up in multiple ways, including jamming up so they won't fully release.
Any slippage before the current problem? Miles on the car? Did the pedal suddenly drop? Is the pedal return spring still intact?
Easy answer is replace everything, more diagnosis might find a smaller issue.
