About the indents, it sounds like you just need to set up your default ruler setting. This is found in Preferences, under the Text Editing section. There is a demo section with a ruler where you can set what new documents made in Scrivener will be configured to. You can set everything from tab stops, to indents, to line spacing here. You can also choose your favourite font right below that section.
Note that, as is mentioned in the FAQ, changing the default will not reset existing documents automatically. This allows you to have different formatting for different documents if you so choose. If you wish to force reset to your new defaults, see item #3.
See item #2 of the FAQ.