As long as you have a legit, paid version of Minecraft, joining and hosting a server is 100% free.
A Minecraft account is 100% free. But buying the full version costs 28.95.
If you've purchased a Minecraft premium account then if you download the Tekkit Launcher, it's 100% free.
Yes
Free Minecraft Is A Demo Version Of Minecraft And Its Not Premium
You can play the free 100 minute demo (5 ingame days), or play classic mode.
There is no way to get the full version of minecraft for free, but you can play Minecraft Classic for free.
no its 100 percent free and has no viruses proven
yes
Yes, Xbox Live Silver is free.
You can play Minecraft Classic for free from the Minecraft webpage.
Anyways, yes. LAN worlds are 100% free unless you count internet network costs!