Motul 600 or 660 is the good fluid and 1ltr should be enough.
Regarding slope - I think it's better to have car jacked up and wheel off, easier to access bleeding nipples that way. So even surface would be safer for this.
I used normal 500ml plastic bottle with a little hole in the lid and then used clear hose (can't remember the size, but so I just fits over bleeding nipples). One end of hose fed through the hole in the lid, so old brake fluid drains into the bottle, and other end goes over the nipple when you undo it, so it doesn't squirt everywhere.
And follow bleeding procedure.
Remember that there are 2 nipples on brembo calipers and make sure you don't run brake fluid bottle dry, as you will get air in the system and will have to bleed it again lol just keep topping it up to the top.
Hope that helps and not too confusing lol