At least 50. (estimate)

How many times have you sneezed or coughed today?

Sneezed once, haven't coughed.

How many minutes is the longest song in your music library?

"The Divine Conspiracy" - Epica (not the album, the song!) at 13:57, almost 14 minutes! I didn't even know it was that long!

How many minutes/seconds is the shortest song in your music library?

51 Seconds.

How many hoodies do you own?

26. I love hoodies! :D

How many band t-shirts do you have?

6

How many countries have you been to? (32, for me!)

1.

How many bones have you broken in your lifetime?

Aw, I feel for you. Which one?

just three. left leg twice, and right arm once.

EDIT: Forgot a question. How many people live in your house?

^U.S. I've been to a bunch of different states, though! :D

6.

How many pets do you have?

5 fish (do those count?)

how many times have you screwed up today?

6. Not counting small errors while writing, which I erase and fix immediately.

How many hours do you sleep on the average night?

5 or 6, insomnia does that to you

How many hours do you play the Sims on an average day?

15.

How many pages of homework do you have?

None! (I'm on break, again)

How many television series have you watched in the past week?

Er... 2, I think...
An episode of CSI and a F1 race

How many letters are there in your last name?

Vance-Pleasantry . . . 15 and a hyphen!

How many tabs do you have open right now in your brower? (I have 9)

Only 1. I never have a lot of tabs open, 3 is the most I usually have.

How many of you have noticed the thing at the bottom where it says 'You are being seved by www.modthesims.info powered by pink lacy boyshorts with a little cutout in back and a hot pink bra with light pink lace'?

OMG I never noticed that!!!

How many roads must a man walk down before you can call him a man?

LOL Alex - mine says :
You are being served by www.modthesims.info powered by pale yellow boyshorts with lace and a little bow and a shiny black bra with front closure"

Umm, probably about 77 x 70 roads.

How many times have you bought something on impulse that you would never wear outside?

Hmmm, three or four. I'm not very impulsive when it comes to clothes!

How many cameras are in your house?

At least 10. If you're talking about handheld cameras and cell phone cameras. Because we don't have a video system that tracks what everyone does. That would be megas creepy.

How many hats do you own?

Woah. I never noticed that! LOL XD.

Anwayss, I own 5 hats (:

How many sisters/brothers do you have?

Mine now says: "You are being served by www.modthesims.info powered by sheer black boyshorts and a black lacy bra top thing"

None. Zero. Zip. Nada. Goose egg.

How many times have you worn something backwards... outside... without knowing?

Edit: whoops, too slow.

Only once, I think... :P

How many best friends have you had in your life?

We responded to the same question... haha... let me count... one, two, three, four, five, maybe six.

Five, or six. But the 2nd was a backstabbing little #@*!(*^%.