How can I use bullets and Numbering in Notepad++?

Notepad++ is just a text editor. As long as no-one implements a custom plugin that takes advantage of special unicode characters looking like bullets, you probably need to stick with "-" and "1)" kind of syntax.

Notepad++ doesn't support this, as it is a text editor. However, on Windows we have "Alt codes" for all text fields, and the text field in Notepad++ is no exception. The "Alt code" for a bullet point is Alt + 7. Make sure you use the number pad.

Alternatively, just write a nice ASCII hyphen. Your text file's readers will thank you!

Indentation can be done with just tabs or Edit->Indent menu