Answer:
What relies on columns but isn't a house, and asks for help but can't speak itself?
When I'm born I fly. When I'm alive I lay. When I'm dead I run.
A house of wood in a hidden place. Built without nails or glue. High above the earthen ground. It holds pale gems of blue.
My first keeps time, my second spends time, my whole tells time.
If you have it, you want to share it. If you share it, you don't have it.
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.