Avoiding Inheritance tax and capital gains tax

gimme

My parents are seperating and are looking into signing over the house to me. The house (worth below £100,000) will be a gift and my parents will move out. My dad within the first 6 months once he has found another place to live.

am i exempt from IHT because its below the threshold of £320,000 providing they both live for the next 7 years?

am i exempt from CGT because it has been their main and only home? if so does that mean i will recieve any gain in the property value at point of resale?

and what exactly is private residance relief? will i or my parents benefit from this?

also will it be a problem if i remortgaged 50% once the deeds are handed over?

If you can answer one or all of the above questions it would be much appreciated.