How to transfer all your music and iphone music to a a new laptop?

How can i transfer all the songs i purchased and downloaded from one itunes saved on a desktop to a new computer?

Log into your iTunes account on the new computer and all your songs from your other computer should be there.

All you should have to do is log into your I tunes account on your new laptop and it should save your music library.

Use a usb
Save them online
There are software programs that transfer from ipod to computer
Back up songs online

ITunes say: No, but iStonsoft say: YES,

you can google iStonsoft iPhone to computer transfer