What is wrong with my car and can I fix without removing engine on 2000 Ford Windstar

Car makes loud knocking noise and smoking from back. Engine light and oil light on. Car died twice to work. So I put oil in and it still doing it. If it has anything to do with engine is their any way to fix it without having to remove the engine at all.

Asked by for the 2000 Ford Windstar
No sorry but it's major!