Hi emerica,
A good place to start this conversation with the coach is to know where you might fit on the team, and how you might contribute.
The Bard athletic website is very good, and has an excellent archive of past XC performance.
Bard Athletics and Recreation | Varsity Sports
Here is a link to the 2008 Skyline Conference Championships. This tells you who Bard's biggest competitors are, and who else runs in their league.
Cool Running
You can see where you would have finished this 5K race, if you ran your current
PR. Take a look at the current meet results for Bard, and see who their top girls are, and how fast they're running. The Bard coach will be looking for someone who can run faster that the slowest returning runner who is currently in his top 7 or so. If you can't run that fast right now, but have a passion for the sport, and are willing to work, let him know that.
Are you running XC this season? You should meet with your current HS coach and talk this over with him/her. Your HS coach will be contacted by the Bard coach sooner or later, so it would be good to know what your HS coach would say about you, and to let him/her know that you are pursuing running at Bard.
Best wishes to you. Running XC at any level in college can be a wonderful experience, IMO! Distance runners are some of the coolest people around, as I'm sure you know!