I have a trek 2100 road bike that i bought used. The Pedal on there is a clip-on pedal. And i don't have the shoes/clips, or anything, so i'm planning to change it for me to ride it easier and more efficient.

I see some toe clip/strap/cage thingy that can allow me to output power while i'm doing downstroke and upstroke, are those useful?

And any recommandation for a budget, light, good pedal?