Listen to the sounds you find at this page: https://minecraft.gamepedia.com/Ambience
99 percent change the sounds you mean are somewhere in there.
You should probably include the full server logs and crash report. Also I can see that you didn't add more ram your server because of this line: "To start the server with more ram...."
I think you did something wrong, you should be launching the server from the batch your created with the argument in your second screenshot.
Please read this: https://help.mojang.com/customer/en/portal/articles/781529-login-failed
Nobody can help you with account issues only mojang can, you will need to contact support. You can however try to change your password again.
Also, I cant change email because someone already has the name and I do not own the account
I am not sure what you mean by this.
These bonus kits cannot change any gameplay aspect at all so the example you have given would be against the EULA. If you made different armor sets but they have the same protection values as the non rank kits that shouldn't be a problem.
The degree in which something is effecting gameplay doesn't matter if it does it isn't allowed.
Quote from the mojang support page:
When will I hear back?
We're currently replying to cases received on December 24.
Due to the high volume of incoming emails we receive during the holidays, waiting times will be a bit longer. Please be patient, our agents are working super hard to get to your ticket!
If you are having issues accessing your account, make sure you've looked at our list of common issues.
Mojang customer support operates during office hours, Monday through Friday, and our offices are located in Stockholm, Sweden (Central European time zone).
To make sure that we can help you quickly, please fill out the contact form completely and send your message just once. When you get a response, please reply to that email, and it will notify the person helping you. We appreciate your patience and look forward to helping you soon.
Don't try sending more emails worst case they will put you all the way down the list.
You can look at the minecraft wiki if you want to know how to make something. https://minecraft.gamepedia.com/Bed
Also if the monsters are giving you trouble when you are still discovering the game I recommend putting the difficulty on easy or peaceful.
Also, don't spam your attacks but wait a moment between every strike, if you spam your attacks it won't do much damage.
I looked trough it and I can't see what happend, can you tell us when the crash happend? and what you where trying to do. The next person may need that information. I'm an not that good at this myself so I can't help you.
Read the forum rules.
Do you leave your game running for very long times? Because that can sometimes be one of the reasons it happens (I'm talking about 8 hours or more). Updating java and reinstalling minecraft is of course something you can try.
You don't have much to lose by just trying it out right? Also it's not really the question how many but which ones.
I hate armor durability it is always so annoying to have your armor break :p.