its hard to bypass, but should be fairly reelieable. make shure its an imobiliser problem for deffo. try using a different key. try jumping the starter or tow starting. the imobiliser stops cranking, also stops fuel, to bypass youl need to remove inj pump and swap the stop selonoid for a conventional type, this is not the easyist of jobs.
the fuse boxes are common to go down on these, maybe start with this. (under dash, drivers side)