wiring problems maybe?

I just bought the car drive home and then next day everything is going crazy!

Air bag light stays on
heater works when it wants to then goes off and on
radio screen dont work but heads up does
My dic usally flashes low and 0 for everything then somtimes works for a min
keyless system wont go into programming mode nor does the keys work!
My abs and traction light goes on usally after turning or just whenever

Any advice or pointers would be great thanks

Check the grounds on the car especially the one coming from the battery. This sounds like a voltage issue due to bad battery cables. Remember, the cables may look good on the outside but be destroyed on the inside. Also check the connections at the starter solenoid. If these are good then you may have to replace the ignition switch connector at the base of the steering column.

Thats what i was thinking just wanted to make sure there couldnt be anything else before i go play around!

I checked all the fuses and volt and they where the same as the battery!

If i kick the blower motor it will turn on but bangs louder as it goes faster and still no air blowing! I noticed some water on the floor from the door seals leaking or maybe sumthing else but maybe the blower is just rusted out or somthing?

Any other input would be great but i will try to get the key wire thing from a parts store or the dealer today, Thanks