Okay, first, the service engine light will set a code. Goto the closest auto parts store and see if they will read your engine codes for free. Most will. So fine one that will read the codes, find out the code (letter and number) and report back so we can diagnose it.
For the low coolant light, you need to make sure your radiator is full of coolant. Not just the overflow tank. So with the car cool, remove the radiator cap and make sure the coolant is all the way up to the top. If it is not, fill it up.
If the coolant is low, then it is leaking somewhere. If the LIM gaskets have never been changed, then I would suspect that would be the case. Have them checked out.
