Define your own page style (F11
) and check footer (or header: where you want the page numbering go to) to on.
Then Insert>Fields>More Fields...>Document>Type: Page>Format: Roman
in the appropriate section.
Do the same (new page style) for a second custom style.
At the end of page 5 Insert>Manual Break>Type: Page Break
and apply your second style. Then edit the footer accordingly.
For images: select image, right click and choose Insert caption
For tables: Tools>Options...>LO Writer>AutoCaption
check LO Writer Texttable
before inserting a table.
If you already made the table(s) I'm afraid you have to place the cursor just below a table and insert a new table to get the caption (delete unwanted rows after the operation).
Does this help?