Titles

Depends. He is floating the title which states don't like cause they are not getting sales tax when the car was sold. If the person on the title signed it but didn't date it you should be alright. Just date it with the current date in the same ink. If it has a date from years ago you might run in to problems with the DMV.
Also the buyers line needs to be blank so you can fill in your name. If it has another buyer already signed on there then the title is pretty much void.
Alot depends on your DMV and your state laws.