You don't really need the timing tool; you can do it through other means such as the ones listed in Fred's Guide
You will need the fork pivot to change the forks, but how often do you really need to do that?
I'm not sure about the rest, but for the most part you can get by with other more generic tools instead of the official Motobecane issued ones. For example I removed my timing came using a regular puller, not the standard issue Motobecane one.
Basically it's nice to have, but don't spend big bucks on Motobecane specific tools if you can find a work-a-round.