By default the TinyMCE Editor is no longer included because the license is not compatible with YAF.
If you want to include the editor yourself go to tinymce.com download the zip package and extract everything in the folder ..\Scripts\tinymce. Then the editor will show up in the list.
And regarding the tables to allow html tables you need to go to the Host Settings, and add the table,tr,td tags added to the list of allowed html tags in the host settings.