I have the Royal Scott serialized train set, HO Scale. It has been in the box for over 20 years. I took it out and it ran well. In the meantime, should I apply any lubrication to the engine and cars? If so, what kind? Are there instructions on how to apply it?

The tracks look clean but do I need to lubricate them also? If so, what kind of lubricant and how?

Thank you.