The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is an unbiased, massively multiplexed spectroscopic survey, designed to measure the expansion history of the universe through low-resolution (R~750) spectra of Ly{alpha} emitters. In its search for these galaxies, HETDEX will also observe a few times 105 stars. In this paper, we present the first stellar value-added catalog within the internal second data release of the HETDEX Survey (HDR2). The new catalog contains 120,571 low-resolution spectra for 98,736 unique stars between 10<G<22 spread across the HETDEX footprint at relatively high (b~60{deg}) Galactic latitudes. With these spectra, we measure radial velocities (RVs) for ~42,000 unique FGK-type stars in the catalog and show that the HETDEX spectra are sufficient to constrain these RVs with a 1{sigma} precision of 28.0km/s and bias of 3.5km/s with respect to the Large Sky Area Multi-Object Fibre Spectroscopic Telescope surveys and 1{sigma} precision of 27.5km/s and bias of 14.0km/s compared to the Sloan Extension for Galactic Understanding and Exploration survey. Since these RVs are for faint (G>=16) stars, they will be complementary to Gaia. Using t-Distributed Stochastic Neighbor Embedding (tSNE), we also demonstrate that the HETDEX spectra can be used to determine a star's Teff, and log g and its [Fe/H]. With the tSNE projection of the FGK-type stars with HETDEX spectra we also identify 416 new candidate metal-poor ([Fe/H]{<}-1dex) stars for future study. These encouraging results illustrate the utility of future low-resolution stellar spectroscopic surveys.