Hey there,
1) where to configure the toolbar?
For EasyBlog, you can configure the toolbar at
Backend > EasyBlog > Settings > Layout > Toolbar.
For EasyDiscuss, you can configure the toolbar at
Backend > EasyDiscuss > Settings > Layout > Toolbar.
For EasyBlog, you can configure the toolbar at
Backend > EasySocial > Settings > Layout > Toolbar.
2) Is there any custom module positions built in?
If I understand your question, do you mean you want to choose other position for the module?
If yes, you can go to
Backend > Extensions > Modules > select the module that you want to change its position > look for 'Position'.