Anonymous
Going by what I see in your post about i3 and startx do you relies that you have installed the core version their is no X installed with the core version to start with, and dbus has nothing to do with your problem. Just install the full version then install i3 if you wish. Core version is mostly used by people who wish to use the command line or by people who wish to build their own system and they know what their doing in the first place.
Starting a new post about this will not help you at all..
If you are feeling geeky and would like to continue with the core version Dolphin has done it for you have a look that these great videos about installing the core version of antiX..
and so on..