Death Knight Starting Gear

Starting Gear - Green Quality

The Death Knight starts with a full set of green items

Head - Acherus Knight's Hood
Neck - Choker of Damnation
Shoulders - Acherus Knight's Pauldrons
Back - Acherus Knight's Shroud
Chest - Acherus Knight's Tunic
Wrist - Acherus Knight's Wristguard

Hands - Acherus Knight's Gauntlets
Waist - Acherus Knight's Gridle
Legs - Acherus Knight's Cover
Feet - Acherus Knight's Greaves
Finger 1 - Plague Band
Finger 2 - Corrupted Band
Trinket 1 - Nothing
Trinket 2 - Nothing
Relic - Nothing

And after a couple of very easy quests, you'll get your first weapon.

Weapon - Runed Soulblade

After that, you'll do a series of quest chains, which are all quite fun and relatively easy, and at the end of it, you'll be level 58 and have a full set of blue items, here is the list.

Starting Gear - Blue Quality

Head - Greathelm of the Scourge Champion
Neck - Bladed Ebon Amulet
Shoulders - Blood-soaked Saronite Plated Spaulders
Back - Sky Darkener's Shroud of Blood
Chest - Saronite War Plate
Wrist - Plated Saronite Bracers

Hands - Bloodbane's Gauntlets of Command
Waist - The Plaguebringer's Girdle
Legs - Engraved Saronite Legplates
Feet - Greaves of the Slaughter
Finger 1 - Valanar's Signet Ring
Finger 2 - Keleseth's Signet Ring
Trinket 1 - Signet of the Dark Brotherhood
Trinket 2 - Soul Harvester's Charm

Relic - Sigil of the Dark Rider
Weapon - Greatsword of the Ebon Blade or Greataxe of the Ebon Blade