Yes.
Most definitely. No aspect of the game requires internet connection for playing. All that is needed is a working copy of the game.
The Fallout 3 GOTY edition is basically the normal edition with the downloadable content. I'm pretty sure you have the option to omit and add DLC's, so you should be able to add the extra content with the installer, that is as long as both your version and the GOTY versions are the same (not 100% sure about this). You can patch the game after all is installed and it should work fine.
If you get the one with 3g yes. Have a look in stores or on the internet.
You can add internet connectivity buy purchasing a USB Modem, PCMCIA Modem
player.additem X,Y X being item number code Y being the qauntity
Joystick for Fallout 3?No, Fallout 3 is set up for use with keyboard and mouse on a PC.or you can have it on a console without a keyboard which is better known as a controller
Yes that's what I did
Yes, you can use the Spotify app to add songs to your iPod touch. You will have to pay for the songs, and you will need to be connected to the Internet to use the app.
to use dialup internet, or use your computer as a fax machine
No but you can use the GTC on wi-fi to trade
The Internet does know alot of stuff cause people add things on blogs. Alot of people's jobs are involved in adding info to the Internet.
Yes, you can use weapons from Fallout New Vegas DLCs in the base game.