Found an iPhone, how to unlock it?

I found an iPhone in my dorm room! My wireless mouse fell between the bed and the wall (it's fixed and unmovable furniture) but my arm is skinny enough to reach back in there, and I found an iPhone (along with my mouse and an old empty smell proof baggy for the herb (I was dissapointed when it was empty. I don't know anything about iphones really, so I don't even know what model it is, 1, 2, 3g, 4, no clue… How do I tell this? Also, how do I unlock it? It's got the 4 digit unlock thing… It has no service, but that doesn't surprise me because whoever lost it lost it a while ago (there was a LOT of dust on it, could that mess it up?).Is there something I can download to break the password? Again, I have no idea how old it is or how long it was back there, so if the model matters in cracking it you'll have to tell me how to spot which model it is: p

Iphone 5 vs 4S & 16GB vs 32GB?

Price is kind of an object here, but I would like to know what you guys think. I'm still undecided on whether I want an iphone 5 or iphone 4S & 16 GB or 32 GB. I think the only thing I have decided on is what color- Black. Here are some details I can share:

-Around 200 songs
-Don't take too many pictures, if I do, I can move them to my laptop
-Don't plan on taking many videos
-An average amount of apps (Would minecraft pocket edition take a big chunk of my memory?)
-Verizon

P.S. Do they sell 4S 32 GB? I'm not seeing them available. So if anyone could be me some good advice on whether to get a 5 or 4S and 16 GB vs 32?

Sync Music to iPhone will erase all content?

So I've had this iPhone for a while, worked just fine. Now this weekend I was with a friend and wanted to play this music of an artist but found that I hadn't added it to my iPhone. So today I plugged in my iPhone, click on it, click on the Music tab, and for whatever reason the Sync Music box is not checked off, and by attempting to click it it warns me that syncing will cause all existing content on the iPhone to be erased then replaced. This despite the "Selected playlists, artists… " etc circle being selected beneath the sync music option, which is why I have several playlists from my computer synced to my iPhone.

What is the dealio?

Which christmas present to buy for a child who has everything?

My 10year old brother, has almost every toy that the kid on the block has, he has an iphone, xbox, games, nintendo. Hes growing up fast so I don't know what to get him, he seems more interested in technology rather than toys. What could I buy for him?

Added (1). Yes he has a iphone 4!

Can I use an iPhone 5 on Wi-Fi?

If I don't have my iPhone on any plan like I just buy an iPhone 5 can it be used over just Wi-Fi like an iPod? I'll buy it from best buy for Sprint and in a few months I'm getting a data plan so I'll begin using it a phone then. But my iPod just broke and I don't see a point in buying an iPod now then in 2 months buying an iPhone 5.So can I just use an iPhone like I would an iPod until then?