The transmit frequency = RFXTAL frequency * 32. This can be trimmed by the value of C1 as shown in the chart. This is the carrier frequency for ASK modulation.

ASK transmits at the center frequency. FSK transmits a few kHz from center frequency. This is explained in the data sheet.

The bit-rate data is transmitted at depends on your firmware. If you look at the Microchip code examples you'll see how they use delays between toggling the data pin to set the bit- rate. 40 kbps is the upper limit.

What you'll have for operating range will vary like the wind depending on your finished RF design, voltage on the PS pin, and a boat-load of other factors like receiver sensitivity, operating environment, antenna design/selection, etc, etc,.