Colour me confused for a moment. You're title asks if you can break a horse from the ground. So, is Bandit broken already and just fresh hence bucking with you'd dad, or is he unbroken and your dad (foolishly) decided to get on him?
If he's unbroken, no you can't break him without getting on him.
If he's already broken and simply fresh from his break in the paddock it would be good to know the circumstances. How experienced a rider is your dad? I know my own dad likes to exaggerate things regarding horses - if my horse has a flip out while I'm riding and my father sees it, he will go on about how my 'bronc' was leaping in the air 6 foot, with his head between his legs. When in fact it was a couple of tiny crow hops in protest to what I'm asking.
Possibly Bandit simply out in a few pigroots, which unseated your dad due to lack of experience rather than nastiness on the horse's part.
Because you are all scared of him now, I would not advise you to get on, though that is what he needs. If you get on him expecting him to buck you off, I assure you that he will buck you off.
Find an experienced friend who can stick on a horse without yanking it in the mouth, and that can ride forwards, and get them to work him a few times. In the meantime, start doing lots of basic ground control - backing up, yielding etc.
Be honest with potential buyers, you will need to drol the price if you can't even get on him to test for people. Breeding or a pretty colour means squat if he's broken but learned to buck people off.
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