refuel ready appear when i started the engine in toyota camry 2010 hybrid

Did you gas 'er up?

http://qrg.toyotapartsandservice.com/pdfs/Camry_Hybrid_QRG_2010.pd f --- check out page 8. From what I can tell it means that the fuel tank is depressurized and the fuel cap can be removed safely.

Damn this iPad. Delete the space at the end of address (d f). Should look like (df)

And if you seeing (refuel ready) your fuel door over the gas cap is probably open too. Someone must have pushed the fuel button to the left of the steering wheel. That's what starts the whole refueling procedure of depressurizing the tank and fuel door opening to give you access to the gas cap.