Desperately need your help!!!

with my Winstar 96 - V6 - 3.8L - 130K miles -

History:
It has been 4 months with coolant loss little by little and temperature gauge jumps to 3/4 when stops at (red light) or traffic jam before the cooling fans start to cool it back down to normal(1/2). Sometimes I see few drops of coolant on ground in the morning and sometimes I see none.

Yesterday the car ran fine after 3-hour trip from PA to MD. This morning when I started the car I experienced that the Engine was running very very rough, the car was shaking, and looks like it was running with one/two out of 6 engines. I aslo heard rattling noise inside the engine and when I looked down underneath of the car I saw oil dripping down hard from the Catalytic converter. I could not trace the oil leak because I did not see any oil on top of the CAT so it's somehow getting there internally and can not see how the oil could get to the CAT...Now I can only back and forward the car from my driveway but it's not drivable on the road.

What could be the problems?
Intake Manifold, head gaskets blown, tranmission or something else?Hopefully not the engine...

Thanks for your help in advance!

I suggest you seek out a mechanic; hopefully one with Ford or even Windstar experience, to look the car over with you.

It would be easy to derive, base on your description, that the situation is rather bad .... but a skilled mechanic, there on the scene, may see things totally differently.