Neet is a national level exam.. so you have to study with all india pattern.. for biology only read ncert books thoroughly.. for mcq you can look for truemans.. for physics chemistry u can follow arihants book.. these are standard good books.. you can also go through study material of various coaching institute like aakash or accross or allen..

Start from the very beginning and best of luck..

Padmaja i really like your ambition.NEET is a very competitive exam. You have to study a lot and but you should make a plan from the very beginning. I cracked medical entrance exam in 2015. I used to read Truemans for biology,, arihant for both physics and chemistry. You may also get admitted in those institutions. Best of luck.