recently wrecked my 2006 si and the gauges seem to be messed up, sspeedometer stays at zero when driving and the temperature gauge lights up but then goes out when car is on. rpm needle doesn't move when driving. check engine light is on as well as the abs light

 

have you checked all fuses to see if any are blown that could of happened after the accident

 

A really obvious place to start is by checking the CEL and ABS codes.