If you can find a vehicle that already has those things on, you'll pay less. Not sure what the labor is on Illuminated Kick Plates, but tow hitch installed by dealer will cost you between $800-$1000. FWIW, the installation isn't trivial. We have to take apart much of the back of the car to get to where the wiring harness gets installed. Also, trimming the bumper is a delicate operation that should be done carefully. That said, the one you'll get from a dealer will look and perform exactly the same as the factory install. And it looks much better than what you'll get from a 3rd party tow install.
If all you're going to do is put bikes back there, you could save some money by opting out of the wiring harness. The hardware isn't that expensive, but it is a significant component of the install time.
Apropos of dgandbver's comment above, if you have the dealer install it, ask him nicely if he would make sure the tech who does the work has done one or two JX/QX60 tow installs already. It goes much smoother the second time around.
IKP's are another PITA install. Again, if you can find a car in stock somewhere that already has them, you'll save some $$.