How to make alterations to embedded citations

How can I change the format of the numbered citation ranges for example:

[1-5] to [1–5] (longer hyphen).

How to I also change the way the references are written at the bottom of the word document.  For example:  getting rid of the p for pages and uneccessary punctuations?

Please attach your output style and give more information about what extaneous punctuation you are seeing, and whether in citations or in bibliography.  –

for em dash are you meaning pages in bibliography (can only adjust by doing a search and replace in your whole library) or cited pages (need to insert in your “cited pages” field, I think.  Most publication houses can make these ajustments in the editing stage.