Hopefully what this InDesign tutorial will show you is that page numbering in InDesign is just as easy to do as it is any other program, and much easier than in most. InDesign allows for quick, easy, and automatic page numbering, and I’ll be showing you how to do that today. It’s a simple trick to learn, takes only a few short seconds, and will be a skill that you will be thankful for every time you need to use it. You can always refer back to this InDesign tutorial should you forget any of the steps.
Note  If TAB and SHIFT+TAB do not work for changing the indents for outline numbering, you probably have the option Tabs and Backspace set left Indent turned off. To change this setting, from the Tools menu, choose Options. Select the Edit tab and check the option Tabs and backspace set left indent. As an alternative to turning this option on, you can instead use ALT+SHIFT+LEFT ARROW or RIGHT ARROW to increase or decrease outline numbering.
Place the insertion point in the paragraph and choose Restart Numbering from the context menu or choose Type > Bulleted And Numbered Lists > Restart Numbering. In normal lists, this command assigns the number 1 (or letter A) to a paragraph and makes it the first paragraph in a list. In multi-level lists, this command assigns the first lower-level number to a nested paragraph.
One of the harder things to do in Adobe InDesign, surprisingly for a page layout tool, is to create multilevel or outline format numbered lists.  The right way to accomplish this, according to the folks at Adobe, is to create a Style for every level of the list you’d like to have! Here are Adobe’s instructions on how to do so (This content is taken directly from https://helpx.adobe.com/indesign/using/bullets-numbering.html#create_multi_level_lists):
Changing the numbering display affects how pages are indicated in the InDesign document, as in the Pages panel and in the page box at the bottom of a document window. The numbering display also affects how you specify page ranges when printing and exporting the document. However, the numbering display does not change the appearance of page numbers on document pages. numbering in indesign