1) Instead of using the '- 1 -' page # format, use a basic format in the headers/footers and type the hyphens before/after the page # field.
2) The commas between index entries and their page refs will disappear if you tell Word to right-align the page #s. Alternatively, add an \e " " switch to the INDEX field.
3 & 4) If you're using a concordance document to build the Index, the form they'll appear in is controlled by the second column of the table you use for this, as I outlined in
https://www.msofficeforums.com/word/...tml#post131815. So, if that table has lower-case entries, italics, TNR, that's how those entries will appear in the Index.