Hi, I own a 2002 Holden Cruze.This morning the car wouldn't start and the engine light was flashing. Maybe fuel pump or crank angle sensor. Can anybody help?

There are numerous causes for the check engine warning light to display.

You need to have the vehicle scanned for fault codes to see what fault codes the vehicle's computer has generated. Once that has been done the mechanics can diagnose the causes of those fault codes and then make what ever repairs or parts replacements that may be needed. It may only be a minor issue. You cannot assume what the likely problem might be and replace parts and hope for the best.
I suggest you either get the car to Holden service or to an independent mechanic who is familiar with the Cruze and has the necessary diagnostic equipment.