0x9A is a broad error code for any issue with the carriage. To see what the issue is, you’d have to open it up yourself and look for the problem.

If there was a way to bypass your lock then it wouldn’t be a very good one. You’re going to have to perform a factory reset. There was an option to bypass it with your google account password in android 4.4 and below, but your phone is far newer than that.

The home button is not required during any step of the restoration process, but good luck getting it to do anything after without the home button.

What’s the amperage of the base you are using? Many cheaper charging bases, especially ones bundles with phones and smartwatches only supply 250-500mA, but tablets and other large devices may require 1-2A (1000-2000mA) to charge properly.

Open Settings > Accessibility and turn off the feature, "Automatically click when the cursor stops".

There’s a guide to install the adhesive here.

It sounds like the button itself may have been damaged. You’ll probably need a replacement.

After looking at some higher quality images, it’s a hexalobe screw. However, you can’t really tell what size it is just from pictures. Try asking the manufacturer.

It’s busted. There’s no coming back from water damage like this usually. Your best bet is to just replace the screen.

Unfortunately, this model is a fixed lens camera, which means the lens is not replaceable without full disassembly, and that replacement lenses aren’t available directly. You can take it to an approved “authorized repair station” or send it to nikon directly, but you will have to pay since it’s out of warranty, and that’s if they still have replacement lenses available. Make sure to inspect any cameras you buy secondhand thoroughly from now on, people sell them damaged very frequently.