Mary:
Your motherboard has a PS/2 combo port. You could get a PS/2 splitter cable, splitting the port into two ports -- a keyboard port and a mouse port.
Here is an example of a PS/2 splitter cable:
https://www.amazon.com/KEYBOARD-SPLITTER-ORIGINAL-ADAPTER-CN-0D4002/dp/B00QIHH3PO/ref=sr_1_17?ie=UTF8&qid=1528737393&sr=8-17&keywords=ps%2F2+splitter+cable
Then get yourself a PS/2 mouse:
https://www.amazon.com/Logitech-M-SBF96-3-button-Optical-without/dp/B008859096/ref=sr_1_4?ie=UTF8&qid=1528737580&sr=8-4&keywords=ps2+mouse+and+keyboard
...and a PS/2 keyboard:
https://www.amazon.com/dp/B0075W8C8S/ref=psdc_12879431_t1_B004XBLDZS
Make sure your computer is powered off when connecting or disconnecting the PS/2 mouse, keyboard, or splitter cable.
Sometimes USB fails; but PS/2 ALWAYS works.