Will Metropcs Samsung SCH-R420 Download Free Ringtones, Games, Wallpapers?

Yes you can - send a pic message from your phone to your home email address - then reply to that   mesage with your ring tone, mp3, or pic attached to it. Then save the pic or tone on to your phone.
I do it all the time. (pic might have to be correct size.)

You can get them I have them. Just download the free software that comes with the phone onto your pc. Then go to zedge.net and download ringtones and wallpapers to your desktop. From your desktop click the software that came with the phone and move the ringtones and wallpapers to the phone icon . Then they are stored on your phone.  A bit of a pain in the butt but at least its still free.

I don't think so I have looked  all over the net and I have found no luck if you find a way let me know please.

You used to be able to from mytinyphone.com but for some reason now you can only receive wallpapers from that site...I've looked everywhere for ringtone sites but have yet to find one. I will keep you posted tho