Looking at the pics I see only light wear on the 14t small cog these cogs had slight ramping twist on the smaller cogs and some teeth short than others by design to improve shifting.. Also since there looks to be no significant pulley or chain wear I would agree that the bike wasn't road much and after a bit of clean up the drive train will likely be fine probably only need a new rear shift cable and maybe a chain.
Last edited by zukahn1; 05-20-20 at 04:36 PM.