turbo or bearing ???

My Peugeot 206 HDI (63,000 km and 5 years old) has a noise in the front right, similar to a turbine, and it's hard to start when it's cold. I think it might be the turbo, although the garage told me it's the alternator bearing or something like that. Could you tell me what it could be and how much the repair might cost? Or if I can buy the replacement part or whatever is broken at a scrapyard? Thank you very much.

Hi friend, to get an idea of ​​the noise, remove the accessory belt that drives the alternator and start it up. If the noise disappears, then it could be the alternator. Let us know how it goes. Regards.