I need help about how to make NPC armor useable by the PC using Apperence 2da. I read the tutorials but I am still stumped please someone help.

I meant to ask before, but how exactly do you mean? The NPC's base clothing appearance?

The Appearance.2da file contains a minnimum set of 2 columns for body models A-J in K1. Depending on the NPC some of the NPC's use these columns meanwhile others will only use the "A" set of columns and others won't use these columns at all. There is also a column for base model, many of your NPC's use this instead. Also depending on your NPC they will use both a model and a texture reference in the 2 columns meanwhile other NPC entries will only contain the model entry and let the game grab the default texture for that model from the model directly. If the NPC your grabbing the appearance from has a model and Texture entry in in the "A" column everything will be easy. Otherwise if your not sure ask somebody to tell you if the entry you are trying to use will work.