Welcome aboard! Asking and reading (a lot) is the best way to get all the answers you need.
You can add your BTC address under your profile settings.
Click on "Profile" and then go to "Forum Profile Information" on the left. Scroll down and find the "Bitcoin address:" field.
By the way, it is recommended to use different address for every thransaction.
This forum does NOT give away coins. But you can earn BTC in many different ways, by:
1) Selling goods https://bitcointalk.org/index.php?board=51.0
1a) Physical or Digital https://bitcointalk.org/index.php?board=93.0
2) Offering your services https://bitcointalk.org/index.php?board=52.0
3) Lending https://bitcointalk.org/index.php?board=65.0
4) Gambling https://bitcointalk.org/index.php?board=56.0
5) Joinning signature and social media campaigns
Bitcoins are stored directly to your wallet via the address you provide prior to the payment. You cannot store any coins under your profile in this forum.
i hope this helps. Enjoy your staying here. And beware of the scammers! One general rule: If it's too good to be true, stay away.