It doesn't come with it, no. You have to buy Microsoft Office.
No.
Yes.
All versions of Excel should work with all versions of Windows.
No. Windows XP is an operating system. Microsoft Excel is an application. It must be purchased separately. When you buy a computer you could ask to buy a version of Microsoft Office and have it installed on your computer, but it does not come automatically with your computer.
It depends. There is no direct relationship between Windows and Excel versions. If you have Windows XP, you probably use Excel 2003. If you have Windows 7, you probably use Excel 2007 or Excel 2010. Excel 2007 and later can read Excel 2003 files, but Excel 2003 cannot read Excel 2007 files, unless you save the files in "compatibility mode." Excel 2007 and later contain some features not available with Excel 2003 and earlier. If you need to use the same worksheets with several versions, then save your files in compatibility mode with the newer versions.
They both share Microsoft office and all the tools in Microsoft office (word, excel, PowerPoint etc).
Not even close. Microsoft Excel is a spreadsheet program. Windows XP is an operating system.
If you mean a Microsoft operating system, such as XP or Vista or Windows 7, then on an IBM PC, it does need to be running before Excel can run. You can also get Excel for other types of computers that do not use a Windows operating system, such as an Apple computer, and Excel can run on those. So it depends on the type of computer and the version of Excel.
Windows XP is a general name given to sevearl operating systems released by Microsft in the early 200's. These include: Windows XP Home, Windows XP Pro, WIndows XP Stater, Windows XP Media Edition, WIndows XP Tablet, Windows XP N, Windows XP K and Windows XP KN
The standard desktop applications of Microsoft Word, Microsoft Excel and Microsoft Outlook will not run if you download them onto a Windows XP or Vista machine. It needs at least Windows 7.
There are many programs that run ON Windows XP that can produce spreadsheets. Windows XP is an operating system (think of a translation layer between software and hardware). OpenOffice.org Calc, GoogleDocs, Zoho docs and Microsoft Office Excel are programs that can be used to create spreadsheets
No, but you can get Windows Live Mail for Windows XP in Windows Live Essentials for XP.