Are Skype’s group and video calling features free? For countries??
Yes, it is free.... All you need for that is a skype connection on the other computer as well (the computer you are trying to connect to.
Yes. Skype to Skype conversations of all types are free (of course, you have to pay for your internet access in order to use it!). Calls from Skype to phones and other services such as online personal numbers, call forwarding, voicemail etc cost money.