you need to focus more on picture taking, my eyes hurt LoL
install can be as simple as pay a pro to do it or spend quality time with your vehicle and DIY.
Here is my 2013 DNX6900HD in my 4runner
Here is my back up camera mounted in the tailgate handle area
View from the camera in the car
For me install is easy. I do it everyday. For you might be a project.
Breaking it down:
six - 10mm bolts get the radio out
wire up radio to harness or pac tato module if you have jbl
wire up metra or pac steering wheel interface
grab reversre trigger from fuse box area, so you need to take off an extra two 10mm bolts to get under dash out
hardest part is routing the camera thru the top boot into the tailgate. you can cheat and go under the bumper camera.
if you choose the tailgate, be prepared to look the condition of your tailgate switch that rolls the window up and down. it might be brittle and break off whn you go routing the camera. also be prepared for the rusty bolts to take off the trim where the toyota emblem is.
here is a hint besides the few i just gave you, about the plastic vapor barrier.
use a razor blade and cut it open like a flap. dont fuss with pulling it off, or else you will get this black gooey stuff everywhere. razor blade open, then duct tape it back together like in the picture below. key thing is use QUALITY duct tape, 3m ect..dont go cheap, or else that will defeat the purpose to cheating, you might as well just pulled the whole thing off. cheap duct tape will not last over time, it dries out and comes off.
So is it a easy job, i am a bad person to ask

Yes, for me.
No, for many others.
If you were to pay me to install this stuff @ my store I'd ask for $200-250 depending on the unit you got. then ask for the car to be left for a few hours. cheaper install is not always better install.
good luck