Does OneNote Support VBA or Another Script Language?

No. Although OneNote is positioned and marketed as part of MS Office, it does not support VBA. There is an add-on (for OneNote 2010, 2013, 2016 for Windows only) called  Onetastic that adds a lot of features and also includes a simple macro language. While it contains powerful commands and functions to manipulate note content, it does not offer much to control OneNote itself. Generally, Onetastic is free, but since version 3.0 the use of macros costs a fee.