If you plug it into your car it will prompt you to install a tune. You scroll thru all the tunes and select the one you want. After that it will start the process. In your case do all the steps except installation and that way you will see what tunes it has.
As far as all the tunes. It depends. If you're talking about cobbs ots tunes, if they are deleted that's not an issue. You can download them free from cobbs website. Now if he is including a tune then the way I mentioned would be the way to check if it's there
If you plug it into your computer in the settings folder I believe or properties it will tell you if it is locked or not.
If you plug it into your car, it will only have 3 options rather than the usual 6.