Yes, of course.You will need caste certificate if you belong to any category other than General and you will need income certificate if you will apply as EWS or any reserved category.But , if you will apply as General category then you will not require any of these.
I hope this helps.
Yes, you can apply for caste and income certificate with proper documents online or through Subdivisions or anchals. But I would recommend you to apply after april1, since most of the institute or body ask for these certificate issued after april 1 of that year. So, wait till April 1, then apply for it
Hope it helps
Yes ofcourse you can apply for any college or university without needing a caste or income certificate. These certificate are required only in those cases where a candidate want to get a seat in college against some kind of reservation for which that seat is reserved. For all general seat you don't any of them. What you will be needing is your class 12 certificate