Can i change my White IPhone 5 to a Black IPhone 5?

I received my iphone 5 in White a couple of months ago on my contract upgrade and i would like to know if i can change it to a black one?
will they ask me to pay an additional fee if they do say yes, is that possible?
I'm on an Orange Contract btw

Does an iPhone 3GS have a SIM card?

I wanted to put my SIM card from my old phone into my iPhone 3GS, so I could keep the plan, but do they even have one? And if so, where, and how do I get it out, and can I put a different SIM card in it?

Does playing games on the iPhone take up data usage?

I just got an iPhone 4, and I was wondering if playing games such as 4 Pics 1 Word, Wordsearch, Mahjong, or Chess would take up data? I'm connected to my Wi-Fi, if that's important. I only have 2GB a month, and I can't afford to go over. Thanks.

Added (1). My carrier is Verizon.

Should I buy an iPhone 5 or iPhone 4S? - 1

What are the benefits of an iPhone 5 instead of buying an iPhone 4S? I currently have an iPhone 3GS. I NEED to upgrade. Either way, I want a 32GB. 64GB is too much for me.

Is this too much to ask for? - 1

Well I was thinking about what I want for my birthday this year since its just about a month to go now and I was considering a few things I would like. I was thinking of an Apple MacBook, studio beats by Dr Dre, new jack wills clothes (hoodies, tops etc) new abercrombie jeans, new make up and to go back to London for a week or so to go shopping again! Does it sound like a lot?
Keep in mind that for Christmas I got an iPhone, iPad and masses loads of new clothes and make up so this may sound abit extravagant!
What do you guys think?