Help with my MacBook pro?

Hi I'm looking to clean my storage from my iPhone, but when I connect it to my MacBook Pro in order to import my photos through image capture my MacBook tells me that I only have 8 photos. Which is a lie because I have 365 photos and some videos. I tried to create a folder and do the simple drag and drop option, but it takes to long. My I cloud also tells me that I have 8 photos, thus preventing the download. I don't know if it's my phone or is it my mac.

Can I still use iphone 5 with ios 10 in 2017?

What would happen if you still use iphone 5 installed with ios 10 in 2017? Does all apps in Apps Store only supported ios 11? Will it become slow. Does it useable in 2017 or 2018 perhaps?

Added (1). I know that iphone 5 is compatible with ios 10.It just that can I still use it without problem. I meant does most apps still support ios 10?

Why would anybody buy an icloud locked logicboard?

Iv noticed ebay is full of iphone 6 logicboard but when you look at the details most, if not all of them say they are icloud locked. Doesn't that make them completely worthless? The only purpose I can find is a person replacing it because they got a icloud locked phone anyway?

IPhone app? Help name it?

My boyfriend has this app on his phone. Its light blue and looks like a messaging app/bubble. Someone help me find the name of It?

IPhone 6s with an iPhone 7 case?

I accidentally bought my iPhone 6s an iPhone 7 case. The cameras are obviously different, but the case does fit around my camera. The camera hole on the case is a little big. Do you think the camera case difference is a big deal? Personally I feel like everyone can see the difference right off the bat thus making it look bad. Side note: I can't exchange the case.