IPhone Repair Question?

I have two IPhones: one is water damaged and one is icloud locked. Can I salvage parts from the icloud locked IPhone to fix the water damaged one? Both are IPhone 6 by the way. Is that feasible through any way?

I want to listen to books on my iPhone - what app(s) do I need to download?

I have taken up bicycle riding. Been listening to Pandora on my rides, but want to spend that listening time more constructively - listening to books.
What app or apps do I need (saw something about NOOK for listening to books?) And does the memory on my phone get used up with each book, or are they stored somewhere in the clouds?

How to switch from iPhone to Android WITHOUT Wi-Fi?

Okay, so, basically I have an iPhone 6 and a new Moto G6 and the chip that controls Bluetooth and Wi-Fi doesn't work anymore on the iPhone, so the traditional and easier way of transferring data doesn't work! Is there any software I can download or any way of doing it all manually? I can plug it into my laptop and download it onto there and put it onto the android I just don't know how!

My iPhone 4 is disabled and I can't undo it?

So my old iPhone 4 was disabled by my little sister a few years ago and I just threw it in the back of a drawer cause I got a new phone and I forgot about it. I recently found it and tried to unlock it but every time I connect it to iTunes it says "to allow access, please respond on your iPhone". How exactly can I respond if I can't get in?

My phones battery dies really fast?

I have an iphone XR and it literally dies in like one hour and i got it december, it used to last 10 hours now it dies quickly, what do i do