Measurements of the top quark mass and the t\bar {t} and single top production cross sections, obtained by CDF and D0 Collaboration at the Tevatron, are presented. The methodology of CDF and D0 top quark analyses and their underlying assumptions are summarized. The CDF and D0 top mass averages, based on about 100 pb^-1 of data from collisions of p\bar p at \sqrt {s} = 1.8 TeV collected by each experiment in Run-I, and obtained from measurements in several channels, are M_t=176.1\pm 4.0\ (stat) \pm 5.1\ (syst) GeV/c² and M_t=172.1\pm 5.2\ (stat) \pm 4.9 (syst) GeV/c², respectively. The combined Tevatron top quark mass is M_t=174.3 \pm 3.2 (stat) \pm 4.0 (syst) GeV/c². The CDF measurement of the t\bar t cross section (assuming M_t=175 GeV/c²) is \sigma _tt=6.5 \pm ^1.7_1.4 pb, and the D0 value (assuming M_t=172.1 GeV/c²) is \sigma _tt=5.9\pm 1.7 pb. In anticipation of the increased amount of data in Run-II, prospects are presented. The fact that top quark analyses are among the best windows to new physics beyond the Standard Model is emphasized.

PACS numbers: 14.65.Ha