Let's make this simple because it starts to get a bit out of control.
First of all, we are a torrent site, and tho we have a section to offer some help, we can't do everything, especially when it's so out of our topic like jailbreaking a MAC.
If your laptop is intel-based, you can wipe, and install a new Mac OS and it will work. If it is one of the newer Macs that use the T2 Security chip, it's very hard to remove the lock and we can't really offer any help on that. I didn't search too much into it but that is my understanding after reading, as I don't use Macs even if you pay me.
Now your options:
* You can go to specific sites that focus on Mac OS and Mac software and see if they can help
* Try and buy some of the solutions you may find on the web about unlocking, but you will do this at your own risk.
* There is the option of just wiping and installing Windows, which based on experience from friends, works just fine, assuming again you have an intel-based older Mac. How to do it? Plenty of guides on the web for that too and no point for someone to copy-paste here. You can then add some themes to make it look like a Mac (but it will never be a Mac) and live happily with it.
* Go to Apple (store or online) with proof of purchase, if not yours, the persons you got it from.
Please understand that is not that we don't want to help, it's just that this is way out of what we do here as a torrent site. We are a Windows and PC software site mainly, and even tho we have some Mac software, those are offered as is.
As such I will close this thread, wishing you the best of luck.