Yes, but it requires a “Sunken Slab” (a depression in the concrete floor) to accommodate the depth of the pan and trap.
No. The high-gloss glaze repels waste. A simple bucket of water or a hand shower spray is enough to keep it clean.
Those are the footrests. They are textured to stop your feet from sliding into the bowl.
Orissa Pans usually require a “High-Level” cistern (mounted near the ceiling) to get enough gravity pressure for a strong flush, or a dedicated flush valve.