[78F350]

+1 to what Stl said. If you aren't even sure where to start, having a shop look at it is probably best. There are lots of possibilities at this point; some not so bad and some very bad. You can make things worse and a lot more expensive if you don't know what you are doing. Driving the car (if you can) may make things get worse.

Running the car for a "couple days" with the low coolant light flashing could very well cause the engine to be sad or angry. Adding coolant after the engine is damaged will make the light stop blinking, but will not make the engine happy again.

I don't think we can be of much help without being there to work on the car, but if you want to answer questions:

Was it running *well* to begin with?

Was the leak from the tube that wasn't connected to anything watery like coolant or oily like oil? Where on the car is the tube?

What have you done to it in the last few months for maintenance and repair?

Have you seen the engine oil and filter? What does it look like?

How many miles are on the car and how has it been maintained in the past?

Would a $500 repair be doable? How about $1,000? A good Porsche shop probably can't fix much for less than $1,000, but they can give you an idea of what needs to be done.