Right-click on the component, click on 'find example projects', there you will find some.
The circuit you want is rather simple:
- feed your timer a 1kHz signal (for simplicity, but can be different)
- configure the terminal count to 999 (remember, its zero-based...)
- Everything else can stay on default
- connect an ISR to the interrupt pin
The the ISR will be triggered once per second (because its triggered when the timer reaches its terminal count). The graphs in the configuration dialog just show you when certain events happen in the counter cycle.
Use the Cortex Systick timer HW, integral to part -
This gets you to 100 mS, then a simple SW counter to get to 1 sec.