After reviewing the free agent list and seeing who the Spurs drafted, I don't think Tolliver will be their first option to fill the fifth big role. I'm not ruling it out and wouldn't be surprised, but I was unaware that Novak was unrestricted (I thought he was restricted).
With Anderson on board to fill the wing shooter role off the bench, I wouldn't be the least bit surprised if the Spurs forgo signing a veteran wing, such as Jones. They already have a younger, more athletic shooter (who's supposed to be ready to contribute immediately) to bring off the bench now, so why further bury Hairston and Gee? The Spurs wanted to get younger and more athletic. A guy like Jones or someone of that ilk was necessary if they didn't get a wing who could step right in and play.
This would still leave them without a long three/combo forward/stretch four. Novak would be a perfect fit in this role, even though he can't guard his own shadow.
The Spurs should sign Splitter, sign Novak, find a fifth big who's more of a long, mobile, rim protector type (Mahinmi would be ideal, but I doubt he re-signs; they could have Richards in this role, but he's not ready for the NBA and Novak is more of a three than a four, so they'd be somewhat thin on the front line), maybe bring in an SF on a non-guaranteed deal for training camp and call it an off season.