An iPhone is a smart telephone. An ipad is a computer that may have telephone capabilities.
The WiFi only models can make calls with FaceTime and Skype and other chat apps. Even the 3G model is not a telephone, so cannot make regular telephone calls.
yes
Not as such but you could make a skype call
Yes
yes. there is the iPad mini which is 7 inches. and the regular iPad which is 9.7 inches
no because you can't text and call on it.
only 2
Yes using FaceTime. But they must have a iPhone 4 or a iPad 2
IPad 2 is the latest IPad that's become available from Apple. Its like an over sized iPod or a mini computer. You can do almost everything you do on a regular computer on an IPad 2. Right now the cost for one is between $500 to 800 dollars.
of course, there are many stores special for ipad repair. you can search it in google, and call them for a quote.
The main difference between the iPad 1 and 2 is that the iPad 2 is thinner and lighter than the iPad 1. The iPad 2 is also faster than the first iPad and the iPad 2 has front and rear cameras.