You can install t3oodle with or without Composer. It’s recommended to use composer.
Just perform the following command on CLI:
$ composer req fgtclb/t3oodle
When composer is done, you need to enable the extension in the extension manager.
You can also fetch t3oodle from TER and install it the old-fashioned way.
t3oodle does not provide any extensions settings. Configuration is made in TypoScript setup.
Make sure to include the TypoScript t3oodle Main (required) to your template.
In Configuration chapter, you see all TypoScript settings and its defaults.
Because t3oodle is based on Bootstrap CSS framework, there is an optional TypoScript for this: t3oodle Custom Bootstrap Styles (optional)