Need help troubleshooting problem with brakes

Check all the caliper slides make sure there not siezed up, and try a gravity bleed , you can also pinch the hoses off to see if the master leaks down
you should have three or four hoses two in front and one or two the rear. The brake pedal should be hard and not sink down. if that's good then do a normal brk/bleed
farthest one first. Also check if there is combo valve on it lightly tap on it with a hammer the valve inside could be stuck.