You cannot. As you just started this account, you can just set up another one with your preferred user name. I can let the Hosts know but, they will generally only do a username change for privacy reasons.

No.

Assuming you are not talking about an iPhone's passcode, you likely encrypted the iTunes backup of the iPhone.  Perhaps you did this to keep confidential data, and/or perhaps health data, etc.

Anyway:

About encrypted backups in iTunes - Apple Support

Dear Diana.McCall, just checked, javascript turn on in the safari app on the ios9.3.5 mini ipad. Thanks

You need an iPhone 5 or newer to upgrade to iOS 10.

It comes up when I sign into my iCloud account and I am using 2factor authorization and I'm in Pa and Texas is a long way from me. When I log in Apples notification says to change my password and I have done that a lot. I check it using google and it's under what's my IP address and then it says check your IP address and when I do it says that it's being used in Canada Africa,the UK and a lot of other countries. I sometimes get a notification that asking me if I want to post my work with Creative Commens. I looked into this on Bing and I looked up my name and it said that some things were removed due to being inappropriate and I Never EVER posted anything inappropriate about me. Canada has recently removed similar stuff. Creative Commons is a company out of CALIFORNIA. I believe that my ex husband has put inappropriate things on You Tube and my youngest son said that my oldest son put a hiide and spy on my phone. I have received texts from my older son that were meant for someone else.

Try connecting it by the cable to a computer and update it that way

Update the iOS on your iPhone, iPad, or iPod touch - Apple Support

this page Find din iPad-model - Apple-support say that model is the one called 4 generation

that one is not included on the list of iPads which support ios11 iOS 11 - Apple (DK)

because it's cpu is 32bit and ios11 is 64bit

Check Your Service and Support Coverage - Apple Support

You can't move a post, but you can request in the thread that you would like it moved, and someone with 150 points or more can request a move for you.