A quick search of this forum on "7130 Ringtones" gave, amoung others, this thread:
http://www.blackberryforums.com/show...7130+ringtones.
Remember, Search is Your Friend!
No you can't save ringtones from an email attachment, they must be downloaded from a website
And finally, you can not veiw the Blackberry "file system". This is considered one of many security measures of the Blackberry.
Hope this helps.
Rcbjr