Yes the bikes are free and available for guests!!! Great way to explore!
Yes, there are a couple of bicycles that they lend to the guests.
I can’t say for certain but I think they are. I did not make use of it myself or inquire about it but I did see other guests coming and going in bicycles. Again, I am not very certain about this.
Get an answer from Bastion Luxury Hotel staff and past guests.