Re: alarm question
UK-spec GTVs and Spiders were imported without the Alfa-standard alarm system (with alarm functions integrated on the key) - instead, they were retrofitted with Meta alarm systems at the dockside.
Sounds dumb, but I'm sure they had their reasons.
If the LED is flashing, that means the alarm is active. There's no immobilser as standard, so ignition isn't affected. Due to alarm misfires, apparently most owners disconnected the siren. Your previous owner may have disconnected the hazard light connection too.
You can get the alarm unit reprogrammed and get new alarm/central locking fobs - from memory Abacus Alarms still service Meta units. Google them, and see what you find.