Hi,
MiniTOC style is controlled by the MiniTOC Options dialog,
which is launched on inserting/editing a MiniTOC Placeholder. To
control fonts and bulleting styles from the CSS, you may change the
properties of li, ul(For bulleted Mini TOC) and ol(For numbered
Mini TOC) as per your requirement, and just check "Use Style from
Topic" check box present in the MiniTOC options dialog.
With this check box checked most of the styling properties
will be taken from CSS itself.