I had this imboliser on my old 1993 clio RSi. Its situated on the top of the glove box and requires a key to activate. It has nothing to do with central locking or alarm, its just an imboliser. There should be two LEDs on the steering column. One of these is the alarm and the other is the imboliser. Its all factory fitted. I believe it was one of the first imbolisers to be factory fitted in a car. Its an old system and mine used to work well, with the key obviously, but then it started imbolising itself without me doing anything (a loose connection) so I disconnected it.
I wouldnt worry too much about it. And my key wasnt gold but a silver key. Hope this helps.