How to restart a Mac to factory settings?

I have a late 2011 model 21.5 in Mac I ended up wanting bigger so right acts I bought a 27 in Mac since I then let my 5yr old get the Mac for his room my mother in law insisted he was too small to my husband and convince to let her borrow it while she bought herself a computer which she nevil will she feels if we have something and she wants it we have to hand it over well turns out she borrowed it and recently someone broke into my house and took my 70" and 63" inch plasmas and my kids 42" and 3 ps3s and an ipad 3 64gb 4g and a 32gb ipad 1 3G well since she had a tv of ours since we moved from a 3bdrm to a 2bdrm she asked to borrow our 55" plasma since her tv is old anyways since we had nothing let she had to give back our tv and Mac since I bought all those electronics and she doesn't even talk to me, well I believe she purposely did this so I won get to use it she blamed it on her daughter that's 8 it has an account which she has no idea what password or user name and they blocked. Commands so I can't restart and press command+? Or hold c key aS told by apple and when I put reinstall cd they changed the setting that in order to restart the computer ask for Admin and password apple send a disc but it wouldn't work either because it won't allow changes before password I will be getting my iPhone 5 tommorow and need to fix it do I can download iTunes and transfer everything from my stolen computer because I will have an empty iPhone 5 which I've. Web waiting for sorry for the 3 page essay just needed to vent a little and find an answer to my question no rude comments please and I can't go into single user mode everything is blocked help!

Can't upload pictures to Instagram?

I recently updated my iPhone o the IOS 6. Well when I did I decide to get on instagram. I tried to upload a picture from my device and something popped up an I clicked no. So now I can't click my libraries and use my own pictures. It says go to privacy settings and enable it so I could. But i don't know where that is please help.

Does syncing an iPhone change its iOS?

I haven't synced my iPhone 3G in a while, and have recently heard about the problems with Apple's iOS 6.
While, if the phone's OS can change through syncing it, I've yet to notice it actually changing anything, I'd prefer not to suddenly get 'Apple Maps' instead of Google Maps next time I sync my iPhone.

Added (1). Apparently iOS 6 is not even compatible with the iPhone 3G.
If that's the case, then it wouldn't be installed into my phone, no?
http://www.apple.com/...whats-new/ [at bottom]

How to fix an iPhone with water damage?

I found my iPhone laying in a puddle on my kitchen table and the screen is messed up and it started sizzling. What should I do? My mom is taking me to the Verizon store tomorrow.

Why is the iOS 6 passbook app not working?

I just installed iOS 6 on my iPhone 4 and when I open the passbook app and hit the App Store button on the bottom it opens up the App Store then an error pops up "can't connect to iTunes Store" anyone having the same issue?

Iphone 5 is on backorder after i preordered it?

I ordered the iphone 5 last friday, and I was suppose to be the 3rd one on the list. However today i received a call saying that they have a shortages of the phone and I'm going to have to wait a week or two. Do you think that I could get some kind of reconciliation from apple for the mess up? Also what valid points can I mention when talking to them

Added (1). I know that but do you think apple will give me like a free case or warranty or something, i mean this sucks i paid money to have that phone on friday.

What's the best way to get free amazon giftcards?

I really want to buy something from amazon and I don't have the cash so what's the fastest and best way to get amazon giftcard. I want something fast and easy and that gives you the most amazon $$$ the fastest. I already tried app trailers and some other iphone reward apps and it worked for a while but as time went on it was harder. I don't care if is on pc or mobile device I just want something easy and fast way to earn some amazon $$$money. I want to buy my girlfriend a iphone 5 since she is a tech nerd and so far I have close to $100 on my amazon acc thanks to reward apps on iphone. I just want the fastest way to get some money it so I can give it to my girlfriend and maybe get laid that same night.

Best place to sell iPhone 4?

I'm getting an iPhone 5 around novemberish and I was wondering where the best place to sell my iPhone 4 would be. I scanned eBay real quick and 8gbs are going for $250-$300 and I have a 16gb and my dads got a 32gb.

Added (1). Btw, the "free" iPhones aren't unlocked. There actually around $1000 because of the contract. A brand new unlocked iPhone 4 8gb is $449.