When someone calls you it shows up on your screen as their name and you have the choises of answer, answer with video, and decline.
yes.
Yes Skype is free.
No. Skype is not a replacement for your phone and can not be used for emergency calls.
yes,you can can call using skype,for that u shoild have a id on skype. U can also try Nimbuzz which provide all chat from all your emails,nimbuzz to nizmbuzz free calls,& paid voip.