so, I am a windows user and I attempted to reload a MAC mini that i recieved from someone else with a new OS. I am unable to get the original apple ID and have already deleted the original partition, is there still a way i can get the OS back?

What model Mac?

Does it have an internal optical drive?

How to identify Mac mini models

What OSX version was on the Mac?

What have you tried?

Did you get install DVDs with the Mac? 2011 and later did not come with install disks but have Internet Recovery. The 2010 could be updated for Internet Recovery

OS X: About OS X Recovery - Apple Support

You do NOT have a 2011. Those did not have an optical drive.

Since you said you have a 2 Hz CPU that mean you have an early 2009. Those do not have Internet Recovery. You are booting to the Recovery partition which was introduced in Lion. You Mac can go to the latest OS which is now Yosemite.

I recommend that you purchase the Snow Leopard DVD here:

http://store.apple.com/us/product/MC573/mac-os-x-106-snow-leopard

Then boot from it and format the HD and install and then fully update SL.

Then you can go to the Mac App Store and "purchase" the free Yosemite.

You can also order a download code for Lion for about $29. It will take a couple of days to get the code

http://store.apple.com/us/product/D6106Z/A/os-x-lion

Yosemite will be very slow with only 2 GB of memory. You can upgrade the memory to 8 GB (2x4 GB)

http://eshop.macsales.com/shop/memory/Apple_Mac_mini/DDR3

If you can't afford 2x4 I would get one 4 GB stick and replace one 1 GB stick

Lion is still very marginal on 2 GB

You can also replace the rotting HD with a SSD and that helps performance and is easy if you are already taking the Mac apart to upgrade the memory.The following are videos for how to replace the memory and HD

http://eshop.macsales.com/installvideos/mac_mini_2009/