Here's a bunch of old school Halloweenish songs to get you in the mood...
Bauhaus "Bela Lugosi's Dead"
Ramones "Pet Sematary"
XTC "Ballad Of Peter Pumpkinhead"
The Specials "Ghost Town"
The Misfits "Halloween"
Ministry "Everyday Is Halloween" (from 1984)
Ministry "Everyday Is Halloween" (the thrashy Al Jourgensen remix from 2010)
Joy Division "Dead Souls"
Morrissey "November Spawned A Monster"
The Smiths "Cemetry Gates"
Sisters Of Mercy "This Corrosion"
Skinny Puppy "Smothered Hope"
Skinny Puppy "Worlock"
The Damned "Grimly Fiendish"
New Order "Spooky"
David Bowie "Scary Monsters"
Sinead O' Connor "I Am Stretched On Your Grave"
Dead Can Dance "Spirit"
MC 900 Ft Jesus "The City Sleeps"
My Life With The Thrill Kill Kult "The Devil Does Drugs"
My Life With The Thrill Kill Kult "Devil Bunnies"
Severed Heads "Dead Eyes Opened"
Concrete Blonde "Bloodletting (The Vampire Song)"
Nouvelle Vague "Bela Lugosi's Dead"
Tears For Fears "Watch Me Bleed"