How to make Apple replace your broken iPhone?

My dad bought a used iPhone 4s from a store that resells used stuff. Today the phone fell and the screen cracked. It still works though, but the screen is now a yellowish color. How can you make Apple replace/repair the phone for free? (If its even possible)

I feel like stabbing myself with a knife because I wasted my father's money because i broke the phone and I hate myself.

Songs off iPhone 5 won't delete?

I swiped delete on my songs and I hit the delete button, but yet the songs are still there its just they have this cloud symbol next to it with a red arrow pointing down. I don't want them on my phone anymore to redownload, I want them DELETED. How do I solve this?

Just got my first iPhone. Apps?

I've never had an iPhone before, and I don't know much about apps.
I'd like some recommendations for apps that will make my life easier, and also some that are just fun.
What do you have on your iPhone?
Thanks a bunch!

Added (1). I got the iPhone 5c.

I have an iPhone 4 8gb and I want to buy a new iPhone with more storage?

I just got my iPhone 4 through verizon a little over a year ago with their "free phones" plan and I love it. But with the new iOS 7 updates going on my phone is super slow and keeps telling me I have no storage left. I've deleted All music, email, and most of my apps and it still keeps telling me this. I went to the apple website to see what kind of deals they had and saw the iPhone 5C for 99$ but no where on the website does it say "with a 2 year contract" till you go to the last page of the check-out.

Is there any way around the "with new 2 year contract" BS to get a new iPhone? Or a place to buy the iPhone 5/5C under 200$ ?

Projector for a home movie night?

I thinking of having a movie night at mine, but the room id host it in doesn't have a tv in. I want to buy a cheap projector, but don't know how I'd go about it? I've seen mini ones on ebay for £30, but do I need a USB, and if so they'd be big and expensive to hold a movie on it? I have netflix on my iPhone and iPad, is there any way I can stream this onto a simple projector? Or even better, make one myself?! Any ideas on how to watch a film on the wall would be great, thanks

Looking for a new Speaker system?

Hi, I'm looking to buy a new speaker system just to listen to music from my iphone 5. I don't listen to music at home purely because I don't have any speakers.

My budget is under $100, so I'm not looking for anything massive. But I'm looking for something with a subwoofer that can deliver the best bass possible for that price, without skimping out on the other speakers which play the highs/mids. It only needs to make a 10'X10' room sound awesome.

They would be used for a lot of rap and heavy bass electronic music (Don't judge my music tastes).

Like I said, I'm not expecting an amazing speaker system. But just something that will last a long time with no issues that has good bass and good highs/mids. I'm not really looking for my house to shake, but things falling off the shelf would be nice. Thanks for any help you can provide, because I have no idea what I'm doing!

Good ebay username for selling?

I'm going to start selling on ebay, just general things such as iphone cases, socks, my own things I don't want anymore, salon hair products, pretty much a bit of everything, all different things. I need help choosing a username, like shop name but I can't think of anything.

How to stop apps syncing from iTunes to iphone?

My nephew has downloaded a lot of games from the iTunes Store on both my phone and ipad, and it gets annoying for me having to wait for the games to transfer from both electronics onto iTunes, I remember there was a way how I stopped the apps syncing onto my phone but I forgot how, is there a way to stop it because transferring it and waiting for it has made me so frustrated!