Today i disconnected my battery (was empty like really empty) and i took it to a gas station to recharge it,i recharged it and came back,installed it as it was ,,,when i started the car i got the following faults:

1-ASR light is ON
2-ABS light is ON
3-Fuel consumption guage doesnt work
4-THE WORST,rpm is on 2 ,when im in P and N its on 2000 RPM,when D its ok,but i feel a little extra throttle...

now im really scared,and i want to know from people of expertise what to do! and what might the problem be,thank u all for viewing my problem!