Newjourney

Hiya there, we are considering a move to Scotland and I was hoping to get some help with questions if possible. 1. I'm was born in Australia, my parents were both born in England - do I apply for a British passport and will this allow me to work and live in the uk without any issues such as proving funds to live? I'm confused about the ancestry visa - is this something else I need to apply for? 2. Husband was born in uk and moved to Australia 15 years ago, no longer has British passport, do we just need to get him a British passport and we are good for him to re enter without any issues? 3. We have two daughters born in Australia - do we need to get them both British passports? And not visas? 4. When arriving to the uk are we automatically covered by the nhs? Thanks so much for your help, these forums are fantastic!