Hose are easy take them off and have them made at a hydraulic shop or some napas make hoses as well the seals for cylinder and suck can be sourced at a hydraulic shop. In Austin tx I use a place called the hydraulic house but look up people the rebuild cylinder and take the piston and head gland...
You are in a bad place then. Bobcat was good about stamping the serial number on the frame so I would spend some time to try to find it. Also with a machine that old there is going to be a lot of obsolete parts so you will be fight that to unfortunately
Also pull the case drain hose off the motor and cap it. if you get a huge amount of oil out of the fitting in the motor while engine is running then you’ve probably have a bad drive motor
The codes I could find all point to the joystick on the left side so start there look at wiring to the joystick also look at the wiring that goes through the joint of the joystick. It could be a bad joy stick as well
Use a flashlight one one side of the radiator and look on the other side of the radiator if you can see light is clean. You’ll have to look at the whole radiator this way. Those tend to clog up on the edges of radiator first so I would start there
Not sure position on the John deer valve but bobcat the bottom valve is the lift valve the middle valve is tilt and the top valve is auxiliary hydraulics
I would start with the seat belt sensor. See if there is a connection issue. Also check the seat and lap bar make sure if there is sensors on those that the connections are good and clean no pushed back pins or broken wires. There are spool locks on the valve so you could check to make sure...