Tax Deed Sales Questions

[Carter Bushman]

What happens when you purchase a tax deed from the courthouse? Are these things usually bought in auction? If they are then does the government take the extra money over what is owed or does that go to the house owner? 

I also heard that buying the tax deed is not enough to own the house but you must also buy the title? I thought that was similar. 

I have also heard that once you have purchased the tax deed you should also negotiate with the house owner for the warranty deed. Is this necessary? 

Thank you very much for your help.