ECU chip, full through exhuast, Intake and a boost controller will get you to 0.9 bar boost which depending on your engine could be 280-300 BHP which the turbo will maxed out at. An intercooler would be advised as the stock intercooler starts becoming inefficient around 0.9 bar. Depending on your exhuast you may also be required to port your wastegate.
The standard fuel system will cope with this but it will be maxing out. rewiring the fuel pump is recommended as well as replacing all fuel filters and making sure the injectors are in good nick. For added safety I'd uprate the pump and the rad