Reinstalling OS X, Apple ID Problem

Hello all!
               I have bought used Macbook Pro late 2012 model. Now I am trying to reinstall OS, when I start installing OS, I get the message to enter your apple ID. I enter my apple ID but it says ''This Apple ID was not used while purchasing this OS''. So whats the solution? How can I change it to my apple ID? And where can I find the old ID?
Macbook Pro Retina
OS X Version 10.9.3

You cannot change it to your Apple ID...a download and install of the Mac OS X permanently ties the software to the Apple ID used for the download.  You would do best by restarting holding the Command and Option and R keys so you restart on the Apple servers (you need a good Internet connection) so you can reinstall the original Mac OS X.  If it was not 10.9 as shown in your information line, you will need to erase the hard drive and then install the original version.  Then setup the machine again, with your Apple ID and do a software update under your Apple ID.
The seller of the Mac should have done that before selling it so the new owner, you, would be able to actually use it fully.

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