The handbrake and ABS lights on and the speedometer stop working?

After driving my vehicle listed above for two 450 2001 for 5 minutes, the handbrake light comes on and the speedometer stops working and goes to 0km/h. (ABS light is constantly on). The car can be driven normally, gears changing normally etc. But if I stop and from gear "1" go to "N" in order to move it to reverse, it writes "0" and trying to get to 1st gear, it is stuck to "0".

I took it to the mechanic, he told me he fixed it, but he fixed nothing. The problem persists so I'm not sure what to do. Faulty speed sensors? Reluctor rings? Rusted handbrake sensor cables? Not sure what else to think. The brake lights work as they should.

Thank you