Updating IPhone 4S to IOS 8.0.2 taking really long time?

I have the really old software on my Iphone 4s, it's probably like 6.1. IIm trying to update it to the newest one and it's taking a really long time. It's stuck on a white screen with the apple sign and a loading bar, the loading bar is almost at the end but not completely, there's less than a millimeter left and it's been that way for over an hour now, I also have no way of restarting it since my lock button is broken so I had to use touch assist to do everything. Is this normal? How long does it usually take?

My iPhone isn't letting me download apps? - 1

I had a gift card and I typed the information into the payment on the App Store so I could get some games that I wanted that cost money… Now it's saying that there was something wrong with the information and when I tried to go to the option 'no payment method' it didn't show it as a choice and now I can't even get free games on my phone… What do I do?

Really weird iPhone 5C issue?

I have to play music to keep my iPhone working. My iPhone randomly turns off when I'm not using it. I can press either the home or lock button once and it will reboot. Sometimes it puts itself in DFU mode. I have restored to the lastest software multiple times and set up as new iphone and not put anything on the phone at all and it still does it. I noticed that it never restarts while I'm on the phone. So I thought of ways to make it stay alive like a phone call. I played some music and turned the volume all the way down and it doesn't restart at all now. So it is most likely a hardware issue since I have had it since iOS 7 and I've restored it several times but why does playing music fix it? I keep my phone playing music 24/7 on silent and when I pause the music, it will shut off after a couple minutes. I really want to understand why this is happening and how I can fix it because I've already opened it so any warranty is long gone.

Added (1). " I noticed that it never restarts while I'm on the phone" By that I meant placing a phone call.

Added (2). It also never restarts while I'm just using the phone.
The only time it restarts is when I don't use it.
I thought it might be a notification glitch that crashed the phone but I don't think so anymore

Get rid of scratches on a iPhone 5s?

I have a few very tiny scratches on the screen of my iPhone 5s. They're barely noticeable- actually not at all noticeable unless I tilt the screen towards the light. However, they are still really bothering me. Is there any way to get rid of very small scratches like these? I read somewhere that toothpaste or vegetable oil helps to minimize them but I don't know. How can I "get rid of them"?