How to retrieve lost photos from my iPhone 4s?

My iPhones display went black last night but it was still working as I could hear Siri whenever I held down the home button. However, my lock button is broken so I had to manually restore my iPhone through iTunes.

I had backed up my iPhone about a week beforehand, so I thought that once I had restored my phone to brand new that it would be ok to set it up as a new iPhone and then restore the backup onto my phone. Every time I try to do this, the showing date of the last backup says that it was from today which would mean that if I were to restore it I wouldn't retrieve any of my contacts, photos, etc.

I was wondering if there was any way of being able to select the restore date so I can get my photos back?

I'm having troubles with storage on my iPhone?

I've deleted pretty much everything I can and my storage is still full (almost 16GB) so I can't delete anything. I want to download lots of music legally but I really can't afford it. If I bought a cheap iPod should I get 16GB/32GB and which iPod should I get? Also how would I download my musically illegally? I just have an app that does it for me on my phone.

Can I sell my iPhone 6 plus, upgraded purchase?

I upgraded to an iPhone 6 plus through ATT. The phone is coming in a week, can I sell it on eBay for a profit? Is there anything tied into that phone prohibiting me from doing so? An activation code or perhaps something else?

Added (1). Let me be more specific, I upgraded through ATT, how does a person who buys my phone activate it?