welcome to the forum. hope u have fun discovering tips and tricks here. PLease do take a moment to check out the forum guidlines and rules before posting (link in my signature) and also try a search if u haven't done so already. but whatever you do...enjoy your phone:)
Btw, as for ringtones: I think you may be able to try file explorer and locate the files you dont want. If not you may have to root the phone to access the locations of the default ringtones. "system/media" If this is the case you can follow the instruction on the 'how to root' section (link provided in my signature) and after gaining superuser permissions you will need to download 'root explorer' and enter the media files. there you will see 'ring tones' - i'm presuming u just delete the ones u dont want.
hope this helps...
Thanks for the reply and I read the Rooting section, but is there a way to do this without voiding my warranty?
as far as i am aware - rooting can be undone:0
It never really worried me, I rooted the phone as soon as i got it. But that's me. This is you:) Take a look over at the how to root your phone section - I'm sure it's answered there.