When a crystal becomes thin at the atomic level, peculiar phenomena discretely depending on its layer-numbers (n) start to appear. Multilayer WTe2 is one such example, exhibiting unique ferroelectricity and non-linear transport properties related to the antiphase stacking and Berry-curvature dipole. Here we investigate the electronic band dispersions of multilayer WTe2 (2-5 layers), by performing laser-based micro-focused angle-resolved photoelectron spectroscopy on exfoliated-flakes strictly sorted by n. We observed the insulator-semimetal transition occurring between 2 and 3-layers, as well as the 30-70 meV spin-splitting of valence bands manifesting in even n as a signature of stronger structural asymmetry. Our results fully demonstrate the possibility of a large energy-scale band and spin manipulation through the finite n stacking procedure.