1) Yes, for the transparent at least. Don't think FL supports bump maps, not entirely sure. Reflective, not entirely sure.
2) Depending on size and complexity, say 3000 - 5000. That's really just a number off the top of my head. As long as the model doesn't have any unneccessary polys you'll be grand. Bevelling an edge to have 10 faces might be a bit extreme for example.