Replacement Key for a Sirion

Forum: 

Hiya guys
When I bought my Sirion a couple of weeks ago it only come with one key so I need to get another. I have had a look around and found that there are two different types, one with a chip and one without so can anyone tell me which one I need? and if I need the one with the chip how do I program it? My car is a 1998 Sirion.

Thanks
Becci

P.S please bear with me if I reply late but I'm not getting notifications of PMs or posts