No you can not get xcode on any windows operating system i heard (even thought this may be in correct) that only MAC OS X users can get this.
You can't install XCode or its SDK on the windows. All you can is create a virtual machine, install Mac OS X there and then install XCode and SDK.
No. As of now you can only run and use Xcode on Mac computers. Even though you go to the process of waiting 4 hours for it to download, when it is complete you can't do anything with it on a Windows computer.
Yes C or C++, although the programing environment is unlike the Mac and Xcode because of the interface. On Mac it is much easier, but still takes skill.
No, you can't, only Mac OS X and iOS programs.
Yes, via virtualisation, its fairly simple, try this guide on how to do it: techentry.wordpress.com
You can use programs such as eclipse, rhostudio, if you have windows. If you have mac you can use eclipse, rhostudio and xcode. Check the links.
Xcode is made by apple its a developing app for programmers so the answer is yes
From Xcode, having safely saved all your source files, you Build an application by clicking the Build button in your Xcode toolbar or pressing the Command and B keys if you do not have a Build button.
XCode for will work on any standard MacBook Pro no upgrading is required. If the Mac is running Lion (OS X 10.7) it will need XCode 4.1.
shipped with OS X
To transfer a JavaScript file from Dashcode to Xcode, simply locate the JavaScript file in your Dashcode project, then copy it. In Xcode, create or open the project where you want to include the JavaScript file, and paste the file into the appropriate directory within the Xcode project structure. Make sure to add the file to your Xcode project by dragging it into the project navigator or using the "Add Files" option, and ensure it is included in the target settings if necessary. Finally, reference the JavaScript file in your code as needed.
Xcode is provided on the developers tools disc that is supplied with all Macs. It can also be downloaded from the Apple Developer's site (See links below).