Q: Can i transfer my itunes music from my PC/vista to my new ipad

Yes via computer iTunes with your iPad connected and selected.

Note: iPad is not a storage device. You cannot sync what you have on iPad to a new computer.

Syncing is one way only: computer iTunes -> iPad/iPhone/iPod touch except music bought from iTunes.

Hardware requirement

• Windows 7 or later
• 64-bit editions of Windows 7 and Windows 8 require the iTunes 64-bit installer; for more information, visit www.itunes.com/download
• 400MB of available disk space

Yes. You can sync your music from iTunes on your computer onto an iOS device such as an iPad:

Sync your iPhone, iPad, or iPod touch with iTunes on your computer using USB - Apple Support

With iTunes, you can sync your music, movies, TV shows, photos and more. After you sync, the content on your iPhone, iPad, and iPod touch matches the content in your iTunes Library on your computer.

That is not going to work with an iPad Pro and iOS 9.  The only version of iTunes for Vista is from about 2008 or so and it will not work with an iOS 9 device.  You cannot load a copy of iTunes in Vista that would be compatible with any device running iOS 9.

You will need to find a newer windows machine, or upgrade to at least windows 7.

Ahh, I missed the "vista" point.

Yes, unfortunately Vista is a little too old to run the current version of iTunes.

THe OP could try to get 12.1.3 for Vista, but not sure they'll be able to update to 12.4.1 which is the latest.

Download iTunes 12.1.3 for Windows (64-bit)

Software:

• Windows XP Service Pack 3 or later and 32-bit editions of Windows Vista
• 64-bit editions of Windows Vista require the iTunes 64-bit installer; for more information, visit www.itunes.com/download