I'm having trouble recovering my iPhone 4?

Long story short: I wanted an app, needed to update phone, tried to update software, but somehow got into a mess. I wanted to update my iPhone 4's software, but when I tried to do so a picture of a USB cable pointing to iTunes popped up. I assumed it meant to do that so I hooked up my phone to iTunes. A message told me to recover my phone in order to update the software. I tried to do so but Error 1934 came up. I almost got a heart attack because my phone was no longer able to be used. I researched and googled ways to solve it. One of the methods was using TinyUmbrella. I followed the steps from: http://arjunicf.hubpages.com/hub/How-to-solve-iTunes-error-3194-in-10-simple-steps. I did as was told. When I tried to restore again, Error 1600 popped up. I researched ways to fix that error. I'm honestly very tired and have no idea what I'm doing. All I wanted was an app and now I'm having a mental breakdown. I have broken things before and have always felt terrible having to tell my parents. I'm trying to solve this on my own but it seems impossible. I want to give up but I can't. I honestly don't have a clue as to what I'm doing and why. Someone please help me. For more information: my iPhone 4 was bought off the Internet from some dude (it was a birthday gift from my aunt), it's jailbroken, my software was probably around iOS 5 or so (I didn't see the need to update till I wanted the app). I'm so scared and really need someone's help.

I can't add music on my iPhone?

My sister just gave me her iPhone 4S. It had her music on it, and her stuff but we already cleared everything out except music. We got a new SIM card and everything, but when I got home to put music on it, it won't let me.
It's a tad bit complicated because all the music that was on her phone, was put on it with her husband's Mac. So when I went to put it on, with my own laptop, it won't let me and I have no idea why. I've synced, and nothing happens. I have no idea why. I already authorized my laptop, I think it says you can have up to 5 authorized computers?
I'm not sure if I did it right and I have no clue what to do, this is driving me crazy!

IPhone 5 volume button issue?

Whenever I touch with my finger the volume down button on my iphone it will activate the button. And it stays with the volume down icon on screen until I adjust the volume in the music app. I'm not pressing it just putting my finger on it ever so gently. I can still get a click noise when I press both buttons so they are not stuck and the mute works. Again I'm applying no pressure just simply touching not pressing the volume down button and it's forcing my volume all the way down.

Thanks for any help. I'm out of the 1 year warranty but still on ios6. There are no panic.plist in the diagnostics.

Can i connect virgin mobile iphone to metro pcs?

I will hopefully be getting my new iphone this week however, i'm getting it from radio shack. I went today and the lady said she "didn't know".
If you have any background, do you think i can connect a no-contract iphone from virgin mobile to Metro Pcs?

Do they charge to upgrade an iphone at T-mobile?

I was just arguing with one of my parents and he/she doesn't want to get me it because he said they will charge him $500 or something to upgrade which is hard to believe and i'm waiting for the iphone 6 & the most dumbest thing is he/she said he/she is going to get it to switch out his galaxy 5 (i think that is the one he has) just to get an iphone & i'm sure they will charge him more than me because he doesn't have an iphone so please help i want to know if they charge or don't charge and how much they do right now i have a iphone 5s

Does downloading 1 GB of stuff use up 1 GB of data?

Here is the more detailed question that wouldn't fit in the title question up there.

If I download some stuff on my computer (1 GB of stuff ) while connected to the internet over a hotspot from my iPhone, will it use up 1 GB of data from my plan?

What happens when you wipe an iphone?

I want to remotely wipe and erase all data on my phone using Find my Iphone. My parents took it. What happens to the actual phone after the wipe? Will the phone display a message saying it has been wiped? Or will they only see that a bunch of stuff was deleted?