3) You can use two separate elements and position them side by side with any desired distance between them.
4), 5) Report height is set in Report Properties dialog (menu command Edit - Report Properties). Height for each band is set in Band Properties dialog (right-click on band header).
You can force a page break by adding a group band to the report and check the Start New Page box for it. Otherwise the pagination is done automatically when the reported data fills the current page.
Generally, reports are intended to work with multiple iterative data where each data element is smaller than the page size. If you do not need the aggregate and grouping functionality provided by reports, but need a better control over formatting and pagination, consider using other template types such as Word. Word templates are quite powerful too, they allow the use of conditional elements, sub-documents, etc. Please refer to the Aware IM User Guide for more details.