does core have a setting for npcs to walk a path or do i need lua?
Standardcombo's NPC AI Kit has a waypoint system and there's an Choreographer by Chris that will also rig NPC pathing. Both are under Community Content and will work for NPC pathing.
how do you use npc ai kit?
There's a lot to it. Here's the tutorial playlist.
sorry to be a pain but it doesn't tell me about how to make way points for npcs. please help?
Inside of the elements there are a readme file, maybe can help you.