Started multi-member LLC this year and have tax questions

Myself and 2 friends started a multi-member LLC this year. We used Nolo and we have our EIN. I have a few questions.

1. Does the LLC itself file a tax return and does it matter who files it?

2. Will I need to buy TurboTax business for the business return?

3. What Turbotax product do I need for my personal taxes to account for my investment/start-up of an LLC?

34 We all put in $15,000 each but we have had no expenses yet and no profit (we just launched) can I claim the $15,000 investment on my personal taxes? 

THANKS!