Can't paint with texture while in single picture I want to replicate wood of knife to my object. On my first try I had no problems with front and rear, but had with above and under. Then I switched some normals and tried, now when I paint over it just paint with some dark brown color. I think I connected everything as I should but since there is problem, probably something isn't right or I messed with normals. Thanks!
When looking at your settings from the screenshot you showed me, I noticed that the color on your color picker was set really dark.  That is probably the reason why it is coming out as this dark brown color.  If you set the color picker all the way up to white, it should paint onto the mesh in it's full vibrancy.

hope this helped!  If you encounter further problems, let me know : )