France Long Stay Family Visa

My parents (non EU British) live legally in France as French residents. My question is, could I apply with my husband and two children to all get the long stay family visa? And if so can we travel freely in the Schengen whilst that visa is active without the 90 day limit?

The information should be found here  https://france-visas.gouv.fr/en/web/france-visas/long-stay-visa