There is no walkthrough for AQW as it is a constantly evolving game with many different areas, plots and side quests.
No, you can not be invincible in AQWorlds.
There are multiple kings in aqworlds.
You can not. AQworlds does not have a trade system.
You can only have one armor on at a time in AQWorlds. You cannot combine armors in AQWorlds.
Kuro is the boss in the river in aqworlds.
download the aqworlds battle bar
The walkthrough can be found on YouTube.
There is a written walkthrough, and a link to a video walkthrough, at the related question below.
You can't exactly be a Guardian on AQWorlds, but you can verify on AQW that you have Guardian on the original Adventure Quest and get Guardian class in AQWorlds. :)
There is a written walkthrough at the related question and a video walkthrough at the related link.
You cannot be a ranger in AQworlds. It is not currently an available class.
AQworlds is based off of Eastern time in the US.