BMW 320i - ASC + Brake + ABS Warning Lights ON

Hey All looking for some advise. The ASC + Brake + ABS Warning Lights came on in my car and wont go off, When it happened there appears to be a noise coming from under the bonnet so i popped the bonnet and it appears to be a motor of some sort which the noise was coming from and kept running from even after i turned engine off, I fiddled around with this and managed to disconnect it, Now not only are those 3 lights on but speedometer + Mileage arent working and Petrol/Fuel gauge are going up and down like a child's seesaw

Prior to all of this there is another issue, when trying to start the car all dash lights and car lights flash but engine isnt ticking over and starting, its almost like the battery is dead but yet its a new battery so kinds stumped here.

Any advise would be really appreciated

Could you tell us what car is it ? E36 ? E46 or any ?

My sister had a similar sounding issue on her E90 318i auto and it ended up being the ABS unit. That was years ago.