Q: How do I get Mid 2010 Macbook Pro back to factory settings?

Here are Apple guidelines:

https://support.apple.com/en-us/HT201065

You will need to use the original Snow Leopard installation disks that came with your MBP to erase the HDD and install 10.6.

Ciao.

Not if you want to set it as it was the day it was purchased new,.  Duplicate disks may be ordered from Apple Customer Service.  They will require the serial number of the MBP (on the back) and there is a fee.

Ciao.