8-speed so probably a free hub bike. Also, it's been idle for awhile.
Quick and dirty:
1. Take off your rear wheel. set it horizontally across a trash can with the cassette facing up.
2. Spin the cassette with your fingers. Notice what rotates and what doesn't.
3. Dribble some WD40 into the crack between the moving part and the stationary part of the free hub body. Give it time to soak in.
4. When the cassette spins freely in one direction and immediately locks up when spun in the opposite direction, you're good.
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