Operating System; Linux Mint 17.2 LTS Cinnamon 64bit
Intel (R) Core (TM) i3 Processor 550 @ 3.20GHzGraphics; Intel GMA HDHDD; 500GB plus 2Tb external HDDMemory; 4.7 GiB

I've been using Linux Mint for a couple of years and have never got Bluetooth to work.
I have a Moto G phone and have tried without success to send photo's to my Computer.
Looking at the Bluetooth settings, the phone is apparently recognised and paired.
Why cannot I get the Bluetooth to work?
Is there a Bluetooth tutorial anywhere that I could read and learn?
Any help would be appreciated,
Thanks.

Sorry but you probably need to offer some additional details. You say you have the phone recognized and paired. Well what information leads you to believe this? Are you looking at Bluetooth management information from something like your network manager and seeing information about a pairing? Have you made your phone available to other Bluetooth devices for data pairing? Because realize that the native phone pairing over Bluetooth is actually audio profiles for things like headsets, not for data transfer. So when I try to transfer something from my phone or tablet via Bluetooth, it specifically is advertising itself with a different Bluetooth profile.

To start with:
- What phone type do you have? Apple, Android, Blackberry, Windows, or other?
- How are you making it so that your phone will connect to your computer? Or are you doing nothing but attempting to connect to your phone using your computer? If the latter, then all you're ever going to get natively would be audio capabilities for either phone calls or music playing.

My Phone is a Moto G Android 5.2 Jellybean.
All indications show from phone and computer that the two are paired.
Scenario; I choose a photo from my phone and proceed to send it to my computer using Bluetooth. The Belkin USB Dongle blinks like crazy but fails to transfer the photo. Phone says photo not sent,

It appears that I can send material (photo's, documents) from the computer to the phone, but not the other way round ... weird!

So I've done this from tablet to tablet. And what I've had to do is to set the receiving one to say "I'm available for attachment to transfer files". Therefore what I think the computer side needs to be set up for is to accept a data connection to receive incoming files. For that you'd need an application of some type running on your MINT system that does Bluetooth transfer. I think just natively it may only just "have" Bluetooth, but now know what to do with it. Unfortunately I don't have Bluetooth on my MINT system here so I can't stage it and test that theory.

Older version of MINT: http://community.linuxmint.com/tutorial/view/898 Says you have to enable receiving files.

A couple of other links refer to Blueman, a utility for gnome designed to manage BT connections and transfers. Most of what I see are instructions/debug assists to get that installed, so check that it either is or is not installed, or if you have some other Bluetooth management application under MINT17.

Making sure that everything was installed for complete Bluetooth functionality, phone and other items were correctly connected and visible, I ticked the relevant box in Personal File Sharing. Rebooted the computer and everything now functions as normal.