Just bought a 95 Cabrio,AC works ok ,blower ok low or no heat

Sounds like you may have a flow problem through the heater core. Are the hoses going into and coming out of the heater core hot? If the inlet is warm, but the outlet cold you have no flow through the heater core.

how is coolant level?

Most likely the foam that was on the blend doors has come off (and probably flies out of your heater vents!). leaving big holes in the doors, negating any 'blending' these diverter doors could be doing. Here's a video on Youtube I found that shows the problem and how to fix it: www.youtube.com/watch?v=4c1cjA-y7yE