yes, you must download the "Broken Steel" add-on for the game. you will then continue your journey and be able to do quest you previously didn't have time for before.
yes i would recommend other games such as oblivion and fallout 3
nope.
yes.
After you finish the main quest the game ends. But if you own it on Xbox 360 and have Xbox LIVE, Broken Steel will extend the main quest and will raise the level cap from 20 to 30.
All the DLC packs are side missions only and must be completed before you end the game. None of them extend the main quest like Broken Steel did for Fallout 3.
Yes? Why wouldn't you be able to? Just don't press left bumber
no even if you install the goty edition of fallout the disc will still be needed to play them.
no
download it from the xbox, or go on downloadable contents in main menu on the game, After if is bought and downloaded, play as your character for a few minutes, then a quest will come up
In my opinion Fallout New Vegas is. In Fallout NV it is easier to make caps so you can buy better wepons and ammo. In Fallout 3 It's hard to make a lot of caps in the begining making it a slow start. But is you want to test your skills play Fallout 3.
Playing Fallout 1 before Fallout 2 is a good idea; while every other Fallout game is largely unconnected to the others.