Yes, before moving to Paris, you generally need to prove employment by securing a job offer from a French company and obtaining a work permit or visa that allows you to legally work in France; this usually involves providing documents like an employment contract and proof of your employer's legitimacy when applying for your visa
I have a house in Normandie (Rouen), and now I'm looking for something in South France (for the warmer weather). I go at least 6 times a year, and looking to move there (if I get everything in order). Better quality of life. Better "quality" of food (groceries). Quite culturally diverse, but that's just my experience.