how can i get my car to run ?

ive resently brought a r reg gti 6 shell with no engine , ive got a xsi on s plate that i wrote off the engine and evry thing is still good as i drove it home afta crash . ive now put the xsi engine into the gti shell changed the chip in the key and changed the imobeliser thing rownd the barrel changed the thing by the interior lite and the engine has got its original ecu .it turns over but the fuel pump dosent work and thers no spark ,is ther a nother imobeliser sumwer els that i have to change ? can someone help me please thank you