The simplest way to observe your requirements is to use M$ Office suite.
If your choice is motivated by the fact that LO is free (meaning no fee and no piracy), you can do it but be prepared for some compatibility issues with “complex” documents: M$ formats are proprietary formats and their specification is not widely available. At least, no developer has signed any agreement with M$. Consequently, what can be done on M$ documents origins in publisehed bits and imperfect retro-engineering.
-
Go to Tools
>Options
, Load/Save
>General
; select Text document
and Word 2007-365 (*.docx)
-
Go to Tools
>Options
, Load/Save
>General
; select Spreadsheett
and Excel 2007-365 (*.xslx)
-
Since you have conflicting requirements for single/duplex printing, create two *page styles. You can keep Default Style for your most frequent task and configure another one for the second case. Margins are in the Page
tab of the page style configuration dialog.
-
Go to Tools
>Options
, LibreOffice Writer
>Basic Fonts (Western)
and set your preferences (I don’t know if it exports to Calc)
-
Since templates are less frequent documents than others, you’ll have to set the format manually when saving (because the Load/Save
options only allow to select one format per type.
To show the community your question has been answered, click the ✓ next to the correct answer, and “upvote” by clicking on the ^ arrow of any helpful answers. These are the mechanisms for communicating the quality of the Q&A on this site. Thanks!
In case you need clarification, edit your question (not an answer) or comment the relevant answer.