does anyone know how many voices seth mcfarlane does in this? and who?

I know he does Peter Griffin, Stewie Griffin, Brian Griffin, Glen Quagmire, Tom Tucker and his son and some more characters. But as far as I know he does at least of 6 characters the voices.

Peter Griffin, Brian Griffin, Stewie Griffin, Glenn Quagmire, Tom Tucker, Jake Tucker, Carter Pewterschmidt, Kool-Aid Man, Mickey McFinnigan, O'Brian, Dr. Elmer Hartman, Seamus, Jasper, Kevin Swanson, Jesus, God, Walters Mom, Nate Griffin...

He does Peter, Stewie, Brian, Quagmire, Tom Tucker, and Carter Pewterschmidt's voices. On Wikipedia, it says others but doesn't name them. So at least 6.

i think he does 6 or 7 of the voices

Like 4 of the main characters... He also dos misc. Voices.

Robot Chicken: Star Wars Episode III (2010)

Emperor Palpatine / Darth Sidious    
    
The Cleveland Show (2009)

Tim         

Peter Griffin

Glenn Quagmire         

Stewie Griffin

Dr. Fist         

Brian Griffin
Robot Chicken: Star Wars Episode II (2008)

Emperor Palpatine / Darth Sidious         

Figrin D'an

Dr. Ball    
    
Seth MacFarlane's Cavalcade of Cartoon Comedy (2008)

Scotsman         

Mario

Ghost of Christmas Past         

Popeye

The Great Gazoo         

Wile E. Coyote

Fido         

Bob Marley

Policeman #2         

Dad

Duck #1         

Dog

Frog         

Steven's Dad

Man #2         

Horse

Bob Dylan         

Storyteller

Psychiatrist    
Phineas and Ferb (2007)

Jeff McGarland    
    
Robot Chicken: Star Wars (2007)

Emperor Palpatine / Darth Sidious    
American Dad! (2006)

Stan Smith         

Roger

Greg Corbin         

Brian Griffin

Peter Griffin         

Glenn Quagmire

God    
    
Bones (2005)

Stewie Griffin    
Robot Chicken (2005)

Grizzlor         

Thor

Santa Claus         

Ratchet
    
Jimmy Kimmel Live! (2003)

Ted    
Aqua Teen Hunger Force (2000)

Wayne The Brain McClain    
    
Family Guy (1999)

Peter Griffin         

Stewie Griffin

Brian Griffin         

Chris Griffin

Glenn Quagmire         

Tom Tucker

Carter Pewterschmidt         

Barney Rubble

George Jetson         

Kermit the Frog

Jesus Christ         

Kool-Aid Man

Dr. Hartman         

Seamus

Jasper         

Roger

God         

Kevin Swanson

Ida Quagmire         

Jaws

Cookie Monster         

Big Bird

Uncle Statler         

Jafar

Dr. Katz         

Stan Smith

Dr. Bunsen Honeydew         

Ernie

Walt Disney         

Speed Racer

Pops Racer         

Ronald McDonald

Spencer Pratt    
What A Cartoon! (1995)

Larry         

Steve

Kid in Pound         

Old Man 1

Redneck         

Scottsman

Pilot         

Ricky


MOVIES
Ted (2012)

Ted    
    
The Drawn Together Movie: The Movie! (2010)

Intelligent Smart Robotic Animated Eraser Lady    
Futurama: Into the Wild Green Yonder (2009)

Mars Vegas Singer    
    
Hellboy II: The Golden Army (2008)

Johann Krauss    
Family Guy Presents Stewie Griffin: The Untold Story (2005)

Stewie Griffin         

Peter Griffin

Brian Griffin         

Stu Griffin

Tom Tucker         

Bugs Bunny

Glenn Quagmire         

Kool-Aid Man

Snarf    


VIDEO GAMES
Family Guy: Back to the Multiverse (2012)

Stewie Griffin         

Brian Griffin

Peter Griffin         

Seamus
    
Family Guy Video Game! (2006)

Peter Griffin         

Brian Griffin

Stewie Griffin         

Glenn Quagmire

Tom Tucker         

Carter Pewterschmidt

God         

Seamus