Quote: "Is there any scripts for non-playerable allies who just walk up and down"
Use waypoints, it's in the manual. It has also been covered on the forums. Use the search function.
Quote: "Is there a script to make a character talk when you click on them, or do you have to use Sound Event/Trigger"
Use the search function.
All of this has been covered before. If you ask questions without searching, you will get told to use the seach option allot. It would save you allot of time to just use it before you ask a question. Allot of people won't even bother helping you until you can show that you have searched the forums first. There are some people that will but they are few.