I have my model but no texture

[HelloFlighty]

how do you create textures for a model you have created, I made a model using 3ds Max and now I want to make a texture for it, it's a building sort of, more like an object, it's smaller than most units are, anyway, was wondering what do I use to make the textures for it, can photoshop be used? if so then what are the steps for making a texture in photoshop? Thank you heaps in advance