What is the ruling on leaving one's family home for a religious environment, provided that ties of kinship are not severed, and what is the ruling on getting married without informing them due to differing viewpoints?

There is no harm in living far from one's parents, as long as one is dutiful to them and does not cut ties with them. As for marrying without the parents' knowledge, one should refer to the fatwas (religious edicts) related to that matter.