There aren't really Terraria "accounts". You just play the game without logging in.
There is no free version. You have to buy it to play it.
Nope.That is if u mean talk in terraria with your voice(using terraria)no.You can use other free programs like skype-you can talk with your mic there and write for free.So just talk in skype and play terraria.
It depends on the website you download it from, some might be unsafe that give you viruses or even possibly scamming you but some are safe but i recommend you buying it on Steam for legal and safe reasons
You can play free online in browser games at many website just google them but i use a website called graggles.com =]
The free version is web browser based only. You can only play it in IE, Firefox, Safari, etc.
There are no main server on terraria so I would suggest google searching "terraria servers" and see what comes up. I have done this and been on multiplayer.
its free. No download required. You play on your browser
You can play Minecraft Classic for free in a browser, at the Minecraft webpage.
More than a million
Aq worlds is free, just go to aq.com you play it on your browser
If you have access to an account that has bought Minecraft, which is hard to do for free, then you can play in-browser and download the launcher to play offline.