Financial talk

I really want to apply and get a credit card(Visa) so that i can buy things online,pay my tution online and several other things with it,but am locked up and really searching for professional advice.1.Am an f-1 student here in the US,Can i apply and get a credit card(for students) or whatever and be given? 2.Is it compulsory that i get a social security number before i can get a credit card number and card? 3.If i dont have one,should i necessarily get one b4 i get the card? 4.Do i have to open a bank account(any bank) and apply at that bank before i can get the Credit Card? 5.How is the money u use on your credit card taken?Is it monthly that they take from your deposited bank account or u would be made to pay monthly of whta u have spent montly? 6.How do i know how much i owe monthly from the use of my credit card if i buy randomly? 7.What is the good and bad credit people talk about,how do i get a good credit score?Please stress more on the payment procedure they use using your Card