Use the same iTunes account on both computers. If not, you can use home sharing when connected to the same WiFi network to transfer the apps and data.
No
Yea at least on my iPod most apps don't use data indent know if it's different for an iPhone though
if that app needs the intenet then yes
Considering current App usage data released to the public, there are indeed people who are addicted to iPhone Apps. Users of iPhones spend the most time using Apps, compared to other smartphone users.
No, only when you download apps. This is pertaining to the iPod touch (4th generation) and iPhone (3rd generation). -Kristi
If you have already purchased apps while online with your iPhone or Touch, open iTunes with your device connected, go to File > Transfer Purchases From "your iPod."To sync apps bought with another account, go to Store > Authorize Computer, and enter the username and password used to purchase those apps. Note that you can only authorize 5 computers with your account, so choose wisely.
They use the same operating system and can run many of the same apps. Using iCloud, you can share the same data over the net. They are separate computers, so they are not integrated in the sense of computer hardware.
The iTunes store offers information about the different apps available for the iPhone. This information usually includes details about how much data they will use on the phone. This is also the same on the Google Play store.
Yes there are many Apps out there ex: Find My iPhone and also if you have iCloud account setup you can remotely erase the data from lost/stolen iPhones
First of all, data and internet are the same thing. Second of all, not all apps do. Apps that need to connect to something like Facebook or Safari do use data. A game like Doodle Jump, does not use data unless of course you decide to play online with someone or you post scores to Facebook or somewhere else.
Document & Data on iPhone are junks files including browser history, cookies, logs, caches of photos and videos, database files stored by your apps. You'll notice that some apps while being very small themselves have accumulated a lot of data. An example of this is shown in the image below, you see that the Facebook app is 109 MB whereas the Documents & Data stored is 1.2 GB. This 1.2 GB is what goes into your "Other" data. These apps on iPhone don't provide a way to delete Documents and Data, uninstalling and reinstalling the app is not the best option here. You can use CleanMyPhone or PhoneClean to delete the documents and data without deleting the app itself.
No, an iPhone is different from an iPod in hardware, as well as software. Some cases may be able to provide cellular data, though, and there are apps available for texting and calling, but the iPod itself needs a wifi signal to use these apps.