Being Frictionless, surface of contact I frequently hear references to a smooth surface, or frictionless pulley.
Can being frictionless be obtained if only one of the 2 surfaces has 0 coefficient of friction?
Or is it for the contact of those 2 surfaces (in friction due to material roughness)?
What in the cause of friction, molecular attraction or adhesion between materials?
 A: Let's try to answer your question.

Can being frictionless be obtained if only one of the $2$ surfaces has $0$ coefficient of friction?

So if we consider two surfaces which are not adhesive in nature and do not deform, then yes, friction can be minimised by making only one of the surfaces smooth.

What in the case of friction by molecular attraction or adhesion between materials?

In this case, there are many factors. 
Maximum friction will be obtained if the contact area between the two surfaces is maximum. This would mean that you will want to make the two surfaces as smooth as possible. This fact is used in F1 car tyres.
So zero friction cannot be obtained in this case because this will only be possible if the two surfaces are not in contact.
Friction can however be minimized by decreasing the surface area in contact. For example treading of tires decreases the friction between the road and tire.
A: I realize this is not an answer. But frankly, I don’t think there is a simple answer. The very good, in my opinion, comments posted thus far confirm that friction is a complex topic. Although we try to use some simple models, one can always find examples where the model we use do not apply. 
If we were faced with actually trying to determine a friction force involving two objects, we would probably have to resort to performing actual experiments involving the objects involved. Then we may be able to predict, within specific limits, what the friction force actually is.
In the meantime, the use of the admittedly oversimplified models can at least be useful in apply other physics concepts (e.g. determining friction work) on an academic level.
Hope this helps (but probably isn’t very satisfying). It was a very good  question.
