Seems self explanatory - if nobody bids on them, nobody gets the resources. Start player is separate from these resources and will always rotate.
If somehow the turn order tiles DID generate resources without anyone bidding on them, who would they go to? That question is impossible to answer, because clearly they don't generate resources without being bid on.
if no player bid for the turn order tile with the start player icon...then the player to the start player's left becomes the new start player and takes the purple start player marker.
It can reasonably be interpreted that this player would also get the two gold resources since the two gold resources are visually bundled with the start player marker on the expansion tile. I think this is the intent of the new tile. You may not care about going first or getting first dibs on boat tiles (especially in two player), but are you also willing to give up two gold resources as well?