Delete windows os and restore to mac os?

Hello, I am a new mac user so "dumbed down answers" would be greatly appreciated : )
My boss gave me his macbook pro because he didn't really like it for whatever reason. While he had it he had windows os installed on it. I would like to erase it and revert back to the original condition with the mac os. I do have all the original discs that came with it. Is this possible? Also, how do I go about doing this? Thanks!!!

What model year is your Mac? If it is a Late 2011 or newer you can use the Online Internet Recovery system to complete erase the drive and reinstall OS X.
If it is older than a early 2011 then you will need the original system discs that came with it to reinstall that version of OS X. Or if it is a late released, after june 2011, Early 2011 model you might still be able to use the Online Internet Recovery system.
One way to tell is to reboot the system and hold down the Command + Option/Alt + r key until you see a globe on the screen. If you see a globe then you might be able to reinstall the original shipping version of OS X from the Apple online servers. If you get no globe or a globe but are unable to reinstall OS X from the screen that comes up then it is a model year before the download only version of OS X came out and you will need the original system discs. If you are your boss do not have them a replacement set can be ordered from Apple for a small charge.

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