Am i using up my data when i'm connected to the Wi-Fi at my house?

So basically i just got an iphone(iphone 4) last night and i'm worried about going over the data usage. I went to setting>general>network and then turned off cellular data. I think i have about 2 things of data to use, i'm not sure if its like gigabytes or what not but yeah. I just wanted to know if i'm using up my data if i'm connected to my Wi-Fi and the cellular data switch is turned off… Cause i use the internet a lot (tumblr, instagram, twitter, facebook, youtube, music etc.) i just want to make sure i'm not using my data if i'm connected to the Wi-Fi at my house. So thanks!

Does Airplane mode work on an iPhone?

Does it work when you are on an airplane? This winter i'm going somewhere and I wondered if I can use the phone as like a iPod touch on the plane.

Currently on an iphone family plan under his name?

My recent boyfriend had an upgrade on his plan so he took me to the at&t store and got me an iphone under his name and now we have a family plan. For personal reasons, I'm moving back with my parents and broke up with him. He wants me to keep the iphone but I'm uncomfortable with the fact that I'm still under his name and that he's paying the phone bill. It's a 2 year contract so I don't want to pay the price of the phone to cancel my line. Can he see who I message and what I do from his account online? Is there a way to keep our phone activity private while being on the same plan?

How to use iCloud to add just a few albums to my iPhone?

On my iTunes and iPod touch, I have a massive load of music but I only want a couple of albums on my iPhone so it's not all clogged up, is there a way of putting just a few albums on iCloud then downloading them to my iPhone? I don't really know anything about iCloud.

Forgot my iphone passcode, I restored it, but I still need my passcode?

I lost my iphone 4 a couple of months ago and since then have gotten an iphone 3G to replace it, it finally got returned today, but I don't remember the passcode. I tried restoring it on itunes, but it still asks for the passcode. Can anyone help?

Please no "you stole it/found it!" because I didn't, I just need help.

How to transfer photos from iPhoto to iPhone?

I just transferred all of my photos from my iPhone to iPhoto and deleted everything off of my device by accident.
I still have the photos though on iPhoto

I'm trying to transfer those photos from iPhoto to my iPhone with the locations, (where I took them) I tried transferring them but it transferred without the location and thats what I want.
**BTW in iPhoto it shows where I took all of my photos so it still has the memory of where I took them
So what should I do?

If you need any more info ask me please!