Are there certain crimes you can bail yourself out of after you've been sentenced? ?

Post sentencing fines and fees wouldn't be called bail. But if the court lets you off with just fines/fees you can pay them and remain unincarcerated. 

This question is confusing to say the least and quite frankly poorly worded! Are you asking if you can get out of a jail term once you've been sentenced? Are you asking if you can get the crime pardonded after you have been setenced? 

#1- There is no such thing as posting a bond after a sentence- Either a person is released back into the community (if they are sentenced to probation, community service, conditional sentence) OR they are transfered to a jail/prison if given jail time.

2.  Yes you can apply for a pardon here in Canada- If its summary offense then a person must wait 5 years after the date of sentencing to apply for the record to be expunged. If it's an indictable offense, then its 7 years after the date of the sentencing being issues. Keep in mind their is a fee to merely apply for a pardon and its $500, and there is no gurantee the government even agrees to grant the pardeon.

NO, bail is granted to secure your appearance in court for trial. Once convicted, the judge can sentence you to a fine as an alternative to jail in some cases. You can't legally BUY your way out of jail in ANY case.

Bail comes BEFORE sentencing.  Bail is funds/property posted to guarantee you will appear on your Court date.