Yes, it should work
Load "windows connect now" on both computers. Some versions may not work though
Windows computers are made to communicate with each other as long as they are on the same internet Network. You could have Windows XP communicate with Windows Vista and Windows Vista communicate with Windows 7. They will all talk with each other and you should have no problems aslong as your Network is properly setup and they are all on the same network. Once they are connected, turning on File or Folder Sharing will give you access on your Windows 7 to your Windows Vista or the other way around.
Yes - both operating systems have implementations of TCP/IP, so they can be networked successfully.
Set up a "Home Network"
you cant
Yes one can use the vista in a server 2003 network As long as it is Vista Business or Vista Ultimate.
There are no boot floppies for Windows Vista. To install Windows Vista, computers must support either booting from a DVD or over a network.
If your friend has a wireless network already set up, then yes (if using Windows XP or Vista) your computer will automatically connect to his network. If his network is protected then he will have to give you the password to enter.
No
mmm i have vista home premium and i connect to networks
If a computer is running Windows Vista, it meets the system requirements for Windows 7. One can upgrade from Windows Vista to Windows 7 easily. Microsoft has prepared a webpage named as "Windows 7 Upgrade Advisor" for more information about the upgrade.
You can download Windows Mobile Device Centre from microsoft.com.