1. vibration when braking - I concur with the reco of most of the guys have your rotors checked/refaced/or replaced if necessary
2. black smoke - normal during first few seconds of flooring the accelerator for heavy acceleration. if black smoke is continuously emitted have your injectors checked/serviced
3. temp backlight and 4x4 lights - bring it to any reputable electrical shop. I would recommend Wizzard in Morato. As some of the guys said, that can be a DIY job
4. 4wd indicator blinking - have the connections checked.

Hope this helps.