I need individual player stats for running back and quarterbacks. Total yards, carries, touchdowns, etc... I got all the data I need back to 1995 from a program called Collegio Football.
To answer your second question, I'm trying to predict stats for RBs and QBs. For running backs, Rushing Yards, All-Purpose Yards, Rushing TDs, Yrds/Carry, and % of games started over 3 years, and Passing Yards, Passing TDs/Ints, Completion %, QB rating, and % of games started over 3 seasons for QBs. I'm building a program and using 3 different machine learning algorithms to train it and then testing to see which is the most accurate.
In reality, I don't expect this to work accurately. If it was this easy, someone would have done it a long time ago. Really, the process is more about building the program and learning rather than making an accurate prediction. But I love football, so it keeps me interested.