Beginner queries on Trading companies

hi,
I am beginner in trading, i came to know some imp aspects of trading in INDIA

I want to know few more,

i follow moneycontrol.com

1. There are many brokarages trading companies. Will my selection of particular company add some sense for my trading(not considering brokerage fee)???

I mean,
other than Brokerage fee, how can ICICI securities or any other company be helpful to me???

2. whether brokerage fee depends on particular person's share loss or gain??