Can't help you with the chords or tabs, but some good Halloween themed songs include:
"This is Halloween" by Danny Elfman from Nightmare Before Christmas - also done by Marilyn Manson
"Thriller" by Michael Jackson
"Monster Mash" by Boris Pickett
"Dead Man's Party" by Oingo Boingo
"Double Trouble" by John Williams on the Harry Potter Azkaban soundtrack
"Ghostbusters" by Ray Parker Jr.
"I Want Candy" by Bow Wow Wow
"Vampires" by Pet Shop Boys
"Paint It Black" by the Rolling Stones
"Hell" by Squirrel Nut Zippers
"Welcome to the Black Parade" by My Chemical Romance
"Theme from 'Halloween'" by John Carpenter
"Somebody's Watching Me" by Rockwell