can i right exam of inter 1st year bipc by studying at home without any college admission for 1st year.. and take admission for 2nd year.. would it be any affective step for neet results??

First of all there will be no examination conducted for you by any body if you don't take admission. If you don't want to go for any regular classes then you can go for open universities or school's. You can just take admission and can prepare yourself by sitting at home. Except this you don't have any other way to attempt examination without admission.