With ignition key turned on instrument panel light up but only a faint click heard. new battery

Sounds like you may have a bad starter or solenoid on the starter. But before you pull the starter do this check, turn the headlights on and then turn the key to start while someone is looking at the headlights, if they go out then check the new battery and make sure it is fully charged. If the headlights don't dim down or go out and you are still hearing a click then you will want to check the starter and solenoid because it must be getting power or else the solenoid would not be kicking in. Hope this helps.