Now that you know how to create a TOC by using outline levels, heading styles, or custom styles individually, you'll be glad to know that you can use heading styles with outline levels or with custom styles. (You can't use outline levels and custom styles in the same TOC, however.)
To ensure your TOC includes the correct entries, you need to select the appropriate options in the Table of Contents Options dialog box. As you can see in the picture, outline levels and styles are both selected by default. However, you don't have to use both outline levels and heading styles — just use the one you want.
Then, select which style goes with each TOC level. For example, you could have a custom style for the TOC level 1 and heading styles for the other TOC levels.