Problems with a 4 yr old horse?

he is only and he is really hyper he is gelded. he runs right through my bit ( is just a snaffle but i dont want to get a harsher bit) he rears when i ask him to collect his gaits. and wont stand still when i ask. how can i fix this? he also founders so he is stalled alot. i ride every day for atleast an hour but cant get the wieght off.he is also a rodeo prostpect. what is a weekly work schedule that could help fix my problems train him for roping and barrel racing and keep the weight off of him