You've definitely come to the right place!

So, in addition to the french-threaded bottom bracket, you'll likely also need a few headset parts as well. Appears to be missing one of the upper bearing races, a spacer, and a locknut. Unless it was included in the sale and just isn't pictured in the ad. Here's a photo showing the parts I'm talking about. These can a little harder to find as I believe you'll need french threads on these as well, but certainly not impossible. I don't believe I have any on hand, but hopefully another member can help you out.