On the immobiliser issue, take the cowl of the stalks / ignition key & have a look at the ignition barrel, you could be missing the coil which works in tandem with the immobiliser. It is a white moulding with a black wire leading off & it recognises that the key is in & then all is well with the world.
They can easily be retrofitted, it’s just a matter of clipping it over the lock mech’. The wiring is less straightforward.
Check first & if absent I’ll see if I can direct you to the appropriate info.
M