In reply to kozzi:
I second Ex Engineers comments. For most alpine / Chamonix routes 50 metre ropes are fine, saves weight especially as you describe yourself as a novice. Much harder, more technical routes or other sport climbing venues are better with or require 60m plus ropes. All depends on what you are ,likely to be doing.
Some abseil descents can be done with a single rope but it is much easier / quicker to have two ropes. I would suggest either a pair of 50m half ropes or, more versatile, one half rope and a triple rated rope so that you can climb with a single or two half ropes depending on what routes you do. The triple rated rope can also be used as a single for glacier travel / easier mixed routes or access / descents. Chamonix has very different multi pitch sports climbs. Valley crags, mid mountain where you may or may not have some snow fields to contend with and scramble access / descents ( such as Aiguilles Rouges area or some routes along the Balcon Nord ), mountain rock routes that require glacier approaches and descents or some mixed climbing involved too. The guidebooks you use, such as Piola, usually indicate what gear is required.
In the longer term, assuming you choose to go from novice to addict, you will probably end up with loads of different ropes for different uses...