Yes.

40 wisdom scrolls, the skill and support gem your class normally gets on the Twilight Strand, two small life flasks and a small mana flask, and five starter unique items (all with 3 linked white sockets except for the quiver).

Marauder: Rust of Winter, Ashes of the Sun, Blood of Summer, Thunder of the Dawn, Remnant of Empires.

Templar: Splinter of the Moon, Remnant of Empires, Ashes of the Sun, Vestige of Divinity, Rust of Winter.

Witch: Splinter of the Moon, Fragment of Eternity, Vestige of Divinity, Scar of Fate, Remnant of Empires.

Shadow: Scar of Fate, Remnant of Empires, Splinter of the Moon, Fragment of Eternity, Blood of Summer.

Ranger: Relic of the Cycle, Slivers of Providence, Fragment of Eternity, Blood of Summer, Scar of Fate.

Duelist: Blood of Summer, Thunder of the Dawn, Relic of the Cycle, Slivers of Providence, Remnant of Empires.

Scion: Splinter of the Moon, Blood of Summer, Remnant of Empires, Scar of Fate, Ashes of the Sun, Relic of the Cycle and Slivers of Providence.

Yes.

Passives: 3 each at levels 1, 10, 20, 30, 40, 50, 60, 70. Total of 24, same as normally gained from quest rewards assuming you kill all bandits.

Ascendancies: levels 33, 55, 68, 75.

How do I choose my Ascendancy?

The levels of monsters at lower depths have been decreased to make Delving from level 1 possible. Monster level is simply equal to depth up to depth 77, where it syncs back up with normal Delve scaling. Level, biome mod and damage/life scaling with depth are the same as normal Delve from depth 77 onwards. Other depth-scaling mechanics like darkness resistance, light radius, Azurite, and rewards will be the same as normal Delving at any depth.

2 points at level 10, then 3 at levels 20, 30, 40, 50, 60 and 70. Total of 20 free ones, same as gained from quests normally

You’ll have access to Niko’s normal shop, and Lilly Roth’s gem shop with some modifications. Lilly’s gems all cost 1 wisdom scroll each, and she also has an extra tab containing all the normal currency trades offered by vendors (except for portal scrolls).

Lilly Roth sells all purchasable gems from level 1, no matter which class you pick. She has the same gem selection as her normal shop.

Every time you complete a new Delve encounter (i.e. move the Crawler to an unexplored node on the map).

No.

Yes. You can turn them in to Lily Roth.

No. Doing this would require an enormous amount of work which would have inhibited us from being able to run the event at all.

Yes. Levels 40 and 70 grant Kitava’s curses, with the usual experience loss, resistance penalty, and Vaal skill soul cost increase.

Normally it’s shared between characters in the same league, but in this event it’s per character. This stops people getting very deep on one character, then quickly making other characters and completing a single encounter to collect multiple copies of Godslayer's Pride. Delve upgrades purchased with azurite are also not shared between characters. Your stash is shared as normal.

The free skill points you’re granted for levelling up include 2 points to match killing all the bandits. You’re unable to help a bandit, or change the skill points to another reward via the vendor recipe.

To party with other players, you would need access to towns or your Hideout which are not available due to the nature of the event.

At the character selection screen, there's a panel below your characters which will list the events available. You can join the event by clicking 'join'. This option becomes available 30 minutes before the event is set to begin. Your character won't be able to move until the event starts.