That's horrible. I dont understand anything. What is going on in this photos? Why 3D models not where they are must stay? Why parts do not have textures, although I did everything, what need. Please tell me what my mistakes are and what needs to do that have normal textures.
Since it appears that you've modified the rear, i suggest to copy the front door textures and to paste them onto the rear (with edits ofc) andd then bake it to the model.