The idea that our universe might be inside another lifeform isn't so far-fetched. After all, each of us had a mother, why not the universe as well.
Knowing the age of the universe is important, if there actually is an age to it. More importantly however, I think the question, where did if come from, and where does it end, or does it? Lets say we know for a fact, that the Universe is exactly 13 billion years, 9 months, 13 days, 6hours, 2 minutes and 16 seconds old.
This will still not tell us how the universe got here. It may help in the investigation, but it will not tell us the important question of, where did it come from?