If i delete my account on myspace will all the comments i left on other peoples accounts dissaper?

yes it will show up as "this account has been deleted" with no comment or it will be deleted entirely.

If i delete my account on myspace will all the comments i left on other peoples accounts dissaper?

yes it will say the account has been deleted

If i delete my account on myspace will all the comments i left on other peoples accounts dissaper?

The comment and user name will kinda disappear, but you will still have the instance of the comment on everyone's comments section. I recommend telling your myspace friends thatyou are changing accounts or deleting your profile just as a courtesy.

If i delete my account on myspace will all the comments i left on other peoples accounts dissaper?

Yes. And the box with your picture in it will have a big X on it with the word DELETED.