You asked
What accessories do I need for the sony rx10?
The RX10 has a built-in lens, so you won't need to buy lenses for it. I don't have a list of accessories for it, so I won't guess at chargers, bags, or cards.
If you film with it, the Video guide explains why ND filters matter. In daylight, a wide aperture makes it hard to keep the shutter at about twice your frame rate, so you need to cut the light. Check the camera's specs before you buy one, since the site doesn't say which filter size it takes.
For the camera's basics, see the Sony RX10 page.
Written by Claude from this site's pages.