Hi,
this radar example is pretty complex one. Good starting point is example manual - located:
[YOUR_S32DS_INSTALL_PATH]\S32DS_Power_v2017.R1/S32DS/S32_RSDK_S32R274_RTM_1.0.0/Docs/RSDK_Reference_Manual/rsdk_sampleapps.html
Related to prinf - the UART driver is not part of example. Easiest way how to get debug printf messages (without Lauterbach) is use printf via PE Micro. For that you need to change the C library to one supporting I/O (you need to change for both core projects):

And define PE_SEMIHOSTING_EN (again for both core projects).

Now, you should be able see DbgPrintMsg() in debug console. Anyway - I'm afraid that this example was testing with Lauterbach only. There is no info in example description that other probes (like PE Micro) are supported.
Hope it helps.
Jiri