Im new to computers and I was wondering how I would get wifi with this motherboard ASUS M5A78L-M LX PLUS AM3+ AMD 760G Micro A

Solution
Simple solution: USB WiFi Adapter.
10183876-tplink-wireless-wifi-usb-adapter-tlwn321g.jpg


Or PCI WiFi Adapter:
vnutrennii-adapter.jpg


Or even PCIEx1 WiFi Adapter:
tp-link-tl-wn781nd-150mbps-wireless-pci-express-pci-e-wifi-adapter-ookas-1205-12-ookas@3.jpg