What is the film called where a man has womans brain in jar that can talk hooked up to machine and tries get newbody for it?

The film you're describing is "Repo! The Genetic Opera" (2008).

In the film, the character of Rotti Largo, played by Anthony Head, has a "brain-in-a-jar" named "The Fiend" that is hooked up to a machine and can speak. Rotti is obsessed with getting a new body for The Fiend, which was originally his late wife's brain.