Precise questions about TX Module versus receiver

[Nienscecco]

Bonjour! I am very new to the hobby. I have never flown anything (except myself while skydiving...)

All I need to get my first custom quadcopter in the air is a Transmitter / receiver. I already decided I want the Turnigy 9XR PRO radio. I also decided I would like to choose an OrangeRX TX module because I can find transmitters in the 433 MHz range. I won't have an FPV camera system right away so I would like something that does not interfere with the 2.4 GHz wi-fi of my Hero4 session gopro camera. I don't mind the lag I will need to learn to fly anyway. My flight controller board is a KK 2.15 (A donation from a friend). Now I find 2 similar receivers and I am not sure which one to choose and if they would both be compatible with the KK 2.15 flight controller. (The transmitter would be same one for both choices, the one shown in choice #2)

Choice #1 :
https://hobbyking.com/en_us/orangerx-op ... eiver.html

Questions : This is a 100 mW receiver, right? Can it be boosted to 1W by modding the receiver to supply 5V to the RFM22B RF? Can I assume that a RFM22B RF is the same as a RFM23B RF?

Choice #2 :
https://hobbyking.com/en_us/orangerx-op ... tooth.html

Questions : Can I get physical pinout of at least 6 channels on this receiver? Or is my only option to work with APM with an APM compatible flight cntroller? I don't think that the KK 2.15 is APM compatible, is that correct?

Which receiver should I choose? My original idea was to choose this combo which is more plug and play, but this WILL interfere with the gopro wi-fi for sure :
https://hobbyking.com/en_us/frsky-xjt-2 ... eiver.html

I know I start hardcore but I love custom projects. I have good experience with :
- C/C++ programming
- Devices using FTDI chips
- Electronics, design, modding / soldering

I have no experience with Arduino but I have worked with other microcontrollers before.

Thank you in advance. If my understanding is all wrong, please let me know :O)