Reformat Macbook pro HD that is formatted NTFS and running Windows OS

I purchased a Mac book pro, 2010, 2.93 i5 processor. The previous owner had the HD formated to NTFS and windows 8 installed.
I want to reformat the HD to Mac OS Extended and reinstall MAC OS.

I am being told Command + R will get me back the original MAC OS...is this correct?

Any help would be greatly appreciated.

Thank you!
Maynard

This article might be helpful to you. If it doesn't answer your questions post back and let us know.

That Mac is pre Internet Recovery. You will need to order Snow Leopard from Apple, https://www.apple.com/shop/product/MC573Z/A/mac-os-x-106-snow-leopard.

Using Disk Utility, by holding Command + R + option key, you can get the macOS. Alternatively, format the drive & again install the updated macOS. Make sure to take the backup before formatting the drive.