If someone asks a question like this you can guess that he/she is not one of the "tinkering under the hood" people. So please be nice and explain to them what you already know for years in a way they do not get offended.

For the OP: There are several ways to get ringtones to your phone!
You can browse to a ringtone website and download them directly, you safe them to a place like "Audio Files>Ringtones>Your Folder" and in any alarm or ringtone context menu you can use the more button to browse to that file.

Another way is to use tools like audacity (or the website stated above) to make your own ringtones of music you have stored on your computer.

I used espeak to make my own files directly on the phone, it now tells with a some kind of robotic voice "New SMS" and "New Email".

For audacity and espeak you will find howTos and descriptions in the net and on the project websites thereselves.