Can we prepare for auditing without coaching? plz suggest...

Yes i had done self and got exemptiion in audit.... I refered Kamal garg and Surbhi bansal

I always support self study. No coaching institute is going to give you a mixer. 

yes.. u can refer V K Agarwal for professional ethics case studies

Yes, you can crack Audit without attending coaching institutes. If you are looking out for a decent material, then go for paduka publication. Speciality of this study material is it gives you the summary of each of chapter along with detailed explanation.(Summary will be very helpful during exams day as it provide you with easy reference and saves lot of you time as well).

U don't require coaching

books available - Paduka, V K Agarwal, & Surbhi Bansal