Why should pine seeds/nuts be pan-toasted without oil?
When coated in oil you don't toast them. You fry them.
And toasting pine nuts usually means in oven, often tossing (also apply to doing it on stovetop but then tossing should be constant).
Adding oil is pointless for few reasons: Pine nuts (or nuts in general) are already fatty on their own. Adding different oil don't make the taste better. It's just a safety net for a cost of changing the taste.
If you want just use oil from roasted nuts in your dish.