Message comes on when I start it up, it says provide service light. What does this mean?

This means there is a trouble code the computer has stored which will guide us to the problem, this guide can show you how to get the codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please go over this guide and get back to us.