I need to know how to delete this rap music off my ipod I have apple and its 8gb

You must connect to the computer with iTunes. There you can select the music you want t delete.
For that wait till the iPod is backed up by iTunes, then on the left side click on the line with the name of your iPod. Then on top click on Music and then you see what music you can synchronise.
If you already did remove the original backups from the music on the iPad, there is a chance iTunes all remove all these numbers.

Apple has lots of info about every part you want to know about your iPod and iTunes.

this is what you will do, when you sync it again stop the automatic sync the click on your player on the itunes window to see its details, you will see 3 or 4 checkboxes and check manually add music or songs and ucncheck if there is any, the box that says automatically sync music, then click sync, it will start syncing again the disconnect. add songs only to the folder where itunes have got the songs so that next time you sync the ipod the songs previously added wont be erased.
for further details check here... http://www.apple.com/itunes/how-to/#video-sync

when you hold the power button (top left) down untill the slide bar with power down shows up, then slide the slider your ipod is fully turned off. as for downloading music you already have... dont you already have it? if you purchased it under your itunes store name then yes. you can re-download as much as you want.

Reinstall iTunes. That's the easiest way to fix this problem. But don't uninstall it. Just download the latest version from Apple run it and restart your computer.

I would return it

hello when you sync your ipod it will automatically delete all your music off it other then that the 8gig ipod has no delete function on it ,have you try-ed syncing it to a diff computer to see if its your itunes software that's causing the problem ?

open itunes, connect ur ipod and click the photos tab then remove the photos you want to delete.

in iTunes select the ones you do want then reverse that then delete them.

The iPod CD is just the programs neccesary to run an iPod. You can download these programs for free at apple.com/downloads by downloading itunes, it will make available the programs to run the ipod by plugging in the ipod to your computer.

Its best to use Itunes, the files are stored in the ipod in a very complex way and its really easyest to use itunes.

www.apple.com/itunes/download

I'm not sure what you really mean so do clarify if you already have itunes.