I've a 2000 fabia 1.9sdi estate 

With high clutch , what clutch do I need

Is it slipping or having trouble changing gear? If so maybe a bleed of the fluid or change of cylinder . 

 

If not then just learn to adapt to it.. A high clutch doesn't always mean a problem 

Its just high , don't slip hardly just now and again under hard acceleration.

Sometimes a slight judder in long traffic stop starts.

How do you bleed the system thought my old type was cable.

 

All Fabias have hydraulic clutches as far as I know, the gear change is cable.

The system can be bled somewhere around the gearbox. As far as I've read it's a plastic bleeder valve which is very likely to snap, so I would avoid unless necessary. I'm sure more of an expert can expand on this