Pardon me for editing your picture to illustrate some points.
The under exposure doesn't quite do any justice to the picture, so you might want to bump up the exposure by adjusting the curve for a start. The image quality is a little low, and might have affected the colours, so I've also pushed the saturation to make the little objects more visible. There's no need to worry that this will result in a lack of focus in the picture as in terms of proportion, the cobbler is undeniably the dominant subject in the frame, making his tools more visible adds more stories to your picture as it's not just about a cobbler at work, but also the state of the things he uses. Here's a quick edit:
If you insist on doing a black and white version, you might want to consider adding a little tint of colour to the picture to warm it up a little instead of sticking to the usual grey, which can be quite cold. It's entirely a personal preference so you might want to take some time to experiment a little.
When you do the black and white conversion, try to use a method that best preserves the details in the picture as well, so that you do not end up with patches of shadows with little information to read.
As to the feel of the picture, I personally think there's no need to deliberately create an old look for street portraits, simple depictions usually work better as viewers are allowed to read into the details themselves rather than imposing a nostalgic feel. However, if you're keen on creating the old washed-out photograph look, it's not wrong in itself, though it usually run into problems of unnecessary nostalgia and authenticity with stricter critics. I believe some members here are quite skilled in that area of post processing, they might be able to help