As stated above, the Console View is Sonar's mixer.
If you open the Console, select a track and click the arrow next to ProChannel, the PC modules will pop out and you will see that each channel has EQ and a compressor. If you right-click on a blank space in ProChannel, you will see that you can other PC modules to each track. Additionally, you can add EQ and other effect plug-ins by right-clicking on the FX bin and selecting Audio FX from the menu. This makes the console/mixer pretty versatile and should give you plenty of options for your mixer setup.