Hi Pujitha,
I used the following books for FPGE:
-Pharmacology 2nd edition by Mary J. Mycek, Richard A. Harvey and Pamela S. Champe. ISBN is 0-7817-2413-9
-Comprehensive pharmacy review by Leon Shargel, Alan H. Mutnick, Paul F. Souney and Larry N. Swanson. ISBN is 0-7817-2147-4
-For the management part use "Remington's Pharmaceutical sciences".
I studied for about 3 months for FPGE and while doing that I was attending taking full time courses here because I was on F1 and I was working on campus also. So considering all that, FPGEE is not too difficult. TOEFL is not difficult either. I made 50 on TSE in the second try. Now I am studying for NAPLEX.
I wish you all the best for your FPGEE