How can I turn Pine-Sol into an oil?
I can answer the chemistry part of your question... the candle-making part is better suited to a candle making forum. 

There is no easy way of converting the other 90% of (older) pine-sol into pine oil and newer pine-sol has 0% pine oil. Best to purchase pure pine oil. 

Pine oil is cyclic: 

The other pine-sol ingredients are esters and other linear compounds. So using pine-sol to make pine oil would be ridiculous.

I am not certain how much pine oil is needed for a candle to be scented though. It may just be enough. For that you will have to just experiment... or ask on a candle forum.