I've been a professional chef for over 10 years. I got a set of Prima knives when I first started, they must have lasted 6 months tops!! They really are a terrible knife make, very thick un-weildy blades, the edge doesn't last long at all, and the handles come apart in not too long a time either. After my first experience with Prima, i would never go back to them. If you are starting out as a chef and are looking for cost effective quality knives, I would advise you to start with victorinox, even if you can only afford 1 every pay day - victorinox baldes tend to cost £15 to £30 per knife. They are a much lighter knife (Primas feel like a hatchet in your hand - not a good thing) and a victorinox blade will keep its edge a lot better. Also, if you walk into any professional kitchen environment with a set of Primas you will undoubtedly be laughed back out the door!!
I would advise you bought yourself a 12cm to 15cm fruit/veg knife from victorinox, then a chef's knife 20-24cm from victorinox then a bread knife 20-24cm from victorinox. This is a good foundation for a cooking career, your next priority should be a utility or pairing knife. All you need then is a good sharpening steel and you will be set up to handle most cutting jobs most kitchens will throw at you.