Mac computer (Kanata Lakes)

A friend donated this equipment to me after winding down his business. It is an older Mac all-in-one computer plus another monitor for dual monitor setup. I have no keyboard or mouse for it, but you can use any Windows keyboard or mouse. The second monitor is missing the power cord. I'm not savvy with Mac computers and I don't know how to upgrade the OS. You're welcome to it all or it will be recycled at Best Buy.