paris on a tight budget by vivacolombia
There are lots of ways you can reduce your trip total bill. For instance, if you have a 'carte orange' you have a large discount on the Seine Cruise which is a 'must do' in paris.You can have a 'crepe' for lunch which will definitly be cheaper than a full menu and a coffee at a terrace to get a grasp at parisian lifestlye. You can for instance do that in st michel or st germain.
Regarding your card, it will give you student discount for entrance fees but that's about it.