Your CMOS battery is flat, your keyboard is missing or defective, and you have a video problem. Replace the CMOS battery (should be an oddball-looking pair of cells clipped somewhere, yank 'em and rig appropriate D-cell alkalines with a series diode to match the voltage), plug a known good keyboard in, and reseat all the internal cards and connectors, then see if it will boot without errors.
This box may be able to run Windows 3.1 - if it is a 386 model. Otherwise you can use Windows 2 v286 for the 286 models. I'm assuming it still has a hard drive sized between 16MB and 40MB.
You can mount DOS v6.22 (for 386 model) or v3.31 (for 286). Include a file navigator like PFM or DesqView and a decent text edittor like E88 or TED, and an old DOS version of WordStar or WordPerfect.