What does Glycolysis and ETC take in (whats their input) and take out (whats their output) ?

Glycolysis takes in one molecule of glucose (6C), and produces two molecules of pyruvate (3C). This requires the energy from the conversion of 2 molecules of ATP to 2 molecules of ADP.

This process releases energy in the form of 4 molecules of ATP (from ADP) and 2 molecules of NADH (from NAD+)

The electron transport chain (ETC) uses 1 molecule of NADH and 1 molecule of FADH2 (produced in the Kreb's cycle, the stage between glycolysis and the ETC), as well as one molecule of oxygen.

The ETC generates NAD+, 32 molecules of ATP, as well as water as a byproduct.