I'm not a mechanic.. I change my oil and that's about it! I have a 3.4L 2000 4Runner and need some guidance. I can smell some of this burning off the exhaust and there is a large visible leak on the passenger side of engine. Can you guys offer any guidance?

 

That doesn't look like a coolant leak to me.
Looks like a passenger side valve gasket leaking.

 

Well I suppose oil could in theory be called a coolant because without it things will get hot.

Is the level of your antifreeze also going down ??

A coolant system pressure check will help find the leak.

 

Upon another look, it probably is oil and it goes around the entire circumference of the engine along that same level!