It sounds like something is loose, or you have a missing bolt somewhere. Call a few auto shops, most will give you free estimates. It shouldn't be that expensive.
is coolant leaking from engine?or is it leaking from water pump and running down engine and appears to leak from engine
The float is probably stuck open.
Running too lean.
Engine running hot.
NO. You either have a rear main oil seal leaking or the back of the intake leaking oil and even could be a valve cover gasket leaking. But I would say the rear main is leaking and when the engine is running the flywheel slings oil onto the starter.
what kind of fluid, and what's a corsa?
1999 Toyota camery 4 cyl leaks oil when engine running
PULL YOU DIP STICK IS THERE ANY OIL SHOWING ? IF ITS TICKING AND KNOCKING YOU MAY HAVE BLOWN THE MOTOR .. GOOD LUCK
Either one of the heater hoses are leaking or you have a freeze plug on the side of the engine leaking.
They're probably either too hot, or incorrectly timed.
knocking noise
It depends on the type of "knocking noises" you're hearing. Usually knocking noises are caused either by spun or worn main bearings, or worn wrist pins. Either way, it means you need a new engine.