Answer:
This is the main ingredient in spaghetti and Mac-ยญN-ยญCheese.
A big shiny black car nobody wants to be a passenger in.
They come out at night without being called, and are lost in the day without being stolen. What are they?
Raise your right appendage high above your head. Turn your head to the right and you will smell this.
Built of metal or wood to divide. It will make us good neighbors, if you stay on your side. What is it?
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.