Hey guys.. my car isnt idling very well, actually, its rough as all hell..

Once i startdriving and get to around 30kph it runs alright, but when i start it, it sounds like a goddam tractor! it also has coolant leak out through he overflow pipe over night (im guessing while it cools down)

Would i be right in suggesting this is the head gasket gone?

could be a lot of things,

plugs, leads, injectors, filters, vac lines, come to mind.

get the radiatior a new cap and have a pressure test done. maybe a hydrocarbon test for the coolant too.

check the plugs first rusty plugs = head gasket.

failing all that, start tracing it all down one by one (join the club)

dont forget to clean out the ISC