MacBook won't boot, cursor is frozen at login

I have a MacBook (late 2006) keeps freezing at the login. When I get to the login screen, the cursor will not move; it's remains in the same place every time I log in.
Here's what I think what happened.
I created another account in my MacBook because i was going to delete my current account. And when I signed off, the problem begin.
It takes my computer about 4-5 mins to start and get to the log in screen.
My MacBook has been acting very cranky lately, which is the reason why I was going to start the new account.
I know that "source media" is damage. (whatever that is)
Sorry for the typos, I am using my iPhone. I hope someone can HELP ME :'( (I look like this emoticon right now)

ok. I've just switched the machine on with COMMAND + S. When I typed exit I got these two errors:
disk0s2: I/O Error.
0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [ErrType IO] [ErroNo5] [IOType Read] [PBLkNum 1] [FSLogMsgID 1194498672] [FSLogMsfOrder First]
0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [DevNode /dev/disk0s2] [MountPt /] [Path /private/var/log/fsck_hfs.log] [FSLogMsgID 1194498672] [FSLogMsgOrdere Last]
Then it is just spamming with
disk0s2: I/O error.
Is this another bust hard drive? If it is then that's 3 in a row.

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Macbook won't boot up - grey screen only

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http://discussions.apple.com/message.jspa?messageID=4112865
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<When iPod is plugged in at startup, the MacBook does not startup; unplugging iPod lets it startup.
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Oh, shoot! My MacBook won't boot! Silver screen is all I see

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Hi.
My MacBook suddenly froze when I was using it today. Displaying the spinning beach ball.
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Please post back so I am sure I am understanding the situation.

MacBook won't boot, cursor is frozen at login

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