A receiver is the combo of pre-amp amp and tuner in one box (a receiver can also be thought of as an integrated amp that includes a tuner). You still need either an integrated amp, as you already have the tuner, or another receiver but that may depend on your budget, etc. What will your sources of music be? Just radio? Or also digital cd/streaming, etc? Record player? All that needs to be taken into consideration so you get the connectivity and results you need with the next purchase....
Another option is a separate pre-amp and amp (power amp).