my only key to my tf was stolen since then i have replaced ecu immobiliser ignition barrel+key reader from another tf but it was a wagon does this matter?..does the bcm need to be changed as well? it still wont start it cranks over and fuel in it does n e 1 have n e suggestions? would be greatly appreciated

Perhaps fitting the original barrel, find your nearest locksmith who cuts automotive keys & does Ignition key chip flashes and get the car towed over to them.

They will need the VIN/Chassis number (which should be on you rego sticker) and from that, they can cut an ignition key. They will need the car so they can flash the key's chip so the car will turn over.

Happened to me one time when I was locked out. and left my car keys inside.

If this is the issue then no problems, otherwise it could be the immobiliser.

No need to replace ECU, just BEM from donor car. TF ecu doesn't save the code from the key like TH onwards.