Deep Notch has a lot of beginner ice routes. I don't think you can top rope them as I don't know any walk around trails. Most routes are between grade 2 to 3+. Check "An Ice Climber's Guide to the Catskill Mountains" for more details.
One thing new leaders should be aware of is that a lot of the top outs are dirt and rock unless it's a really good year. This means the last two to three moves can be very dicey, scratching on rock.