A: No. The "Yan-kun" mode was not introduced until late 2019.
To find a Yandere Simulator 2016 build download, you should look toward specialized archives. Because the developer, YandereDev, typically only hosts the most recent version of the game on the official website, you will need to use the Yandere Simulator Fan Wiki or the Wayback Machine. There are dedicated community spreadsheets that catalog every single "launcher" version and standalone zip file released since 2014. Look for the October or December 2016 builds specifically, as these are widely considered the most stable versions of that calendar year. yandere simulator 2016 build download