Your 5V has a microSD memory card slot. If your personal computer is compatible with that card type (Most laptops are so-equipped), you should be able to save a music file
The 5V is equipped with Bluetooth version 4.0, which lets you connect to your computer wirelessly. Just pair phone and computer together and drag and drop your music files from your computer to your Alcatel 5V.
If all of the above methods do not work with your Alcatel 5V or if you prefer not to buy new accessories, you can still use one of the numerous free '3G Uploader' services available online. A search on Katapulco should retrieve plenty of them. 3G uploaders are simple: Save your own music on their web site and they will provide a temporary URL. Navigating to that URL with your Alcatel 5V's browser should download the free ringtone.
More on free ringtones
Here are some of the 100% free ringtones (Alcatel 5V-compatible) offered here at MartinsRingtones.com:
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