I would just recommend getting a quart, I can’t see it taking more then that and it’s not very expensive at all. It’s always good to have extra brake fluid on hand! It’s also dot three just so you know!
Here you go. Keep in mind this doesn't include all of the lines. We don't have a capacity for that. Realistically a 12ounce bottle should be plenty for you go bleed the brakes unless you really cycle the fluid out. Any time I buy a pint I'm always throwing out a bunch of brake fluid.
I have been able to replace ALL the brake-fluid in every car I ever owned starting with a fresh pint of DOT3.
Certainly, a quart should be FARRRR more than you need if one is not wasteful during the bleeding process.