Production of Charginos, Neutralinos, and Third Generation Sfermions at an e+e- Linear Collider

We discuss the production of charginos, neutralinos, and third generation sfermions in $e^+e^-$ annihilation in the energy range $\sqrt{s} = 0.2-1$ TeV. We present numerical predictions within the Minimal Supersymmetric Standard Model for the cross sections and study the importance of beam polarization for the determination of the underlying SUSY parameters.