Yes, TOLUS is a Scrabble word!

Letter values in Scrabble US: T 1, O 1, L 1, U 1, S 1.

Is it a valid word?

TOLUS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

aromatic yellowish brown balsam from the tolu balsam tree used especially in cough syrups

Also: balsam of tolu, tolu balsam.