How do i add my own make textures to the model? (PNG, JPG etc)
How do i add basic colours to the model?

Make sure its understandable
No BAD tutorials, this includes the official blender tutorials

Personally, I am a fan of the gryllus tutorials at tufts..
http://asitssfl01.ase.tufts.edu/blackboard/DR21/ImageTextures.html

If that isnt good enough, is too complex or too fast, just search YouTube for 'Blender Texture' or 'Blender UV Map' and try different ones till you find one that talks down to your level.