If you know the language then you don't need to take much pressure. If it is unknown to you, then you first need to know the alphabets, along with this a little bit grammar, history and culture of the language, translation from English to Kannada and vice versa. Best books for preparation- Standard Vyakarana by Visweshvariah Hsk, Kannada Vyakarana Darpana book by MV Nagaraja Rao etc. Read Kannada newspaper daily. You can download the syllabus which is available in PDF Format from http://kea.kar.nic.in/kptcl_2016.htm