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 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.
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.
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
A program like "iSubtitle" for windows would be Windows Media Player. The current version of the Windows Media Player has an option to subtitle nearly any movie the program can play.
MetaX
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.
if you mean make an app, buy a mac, get Xcode, learn how to program objective C (cocoa touch) get a dev lisence, release it on the app store :)
Xcode is a development software package created specifically for Apple/Mac related applications. You will to use a package like Eclipse for the Android platform
naaa
Xcode is made by apple its a developing app for programmers so the answer is yes