Hey.

After completion of your class 12th you can pursue a Bachelors degree in Pharmacy which will take 4 years. You can also go for any Diploma in Pharmacy which may be for years..if you want to specialise further you can go for Masters in Pharmacy for 2 years after completion of bachelors.

Admission in various colleges is done through separate process. They consider your marms in 12th or marks in entrances or both. Here is alist of best colleges to pursue Pharmacy in India-

NIPER, Mohali

BHU

BVP, Pune

Jamia Hamdard

Panjab University , Chandigarh 

BITS Pilani

DIPSAR, Delhi

Bombay college of Pharmacy.

Best of luck