In this study, linear neoclassical resistive instabilities are systematically examined in general toroidal plasmas employing the ballooning representation. The neoclassical modified layer equation is derived through the application of a multi-scale expansion methodology. Moreover, it is demonstrated that the derived layer equation admits an exact analytical solution. It is evident that, based on the inner layer solution and via the procedure of matching with the ideal region, the general dispersion relations modified by neoclassical bootstrap currents can be rigorously derived. These relations can subsequently be utilized to investigate resistive ballooning modes, resistive interchange modes, and neoclassical tearing modes. The analysis reveals that neoclassical bootstrap currents enhance the growth rates and exert a destabilizing influence on resistive ballooning and tearing modes. Furthermore, the resistive interchange mode exhibits complex behavior, wherein the bootstrap current-related factor possesses a critical value , with the unstable region defined as: . Additionally, these dispersion relations are analyzed in the context of a large aspect-ratio tokamak with a circular cross-section. It is established that the neoclassical effect exerts a substantial quantitative and qualitative influence on resistive instabilities. This investigation has yielded a more comprehensive and nuanced understanding of the impact of the neoclassical effect on resistive modes.