Most credit unions and banks require a minimum to open. It can be anywhere from $1, $25, $50, and even $100. You just need to look for and account and read their terms and conditions. Most banks give access to this on their websites.
No. Read all the conditions when you open any bank account.
No there is a minimum balance requirement. I've open one with 5 bucks long time ago but I don't think that's possible now..
It depends on the account. Some do require minimum deposit when you open the account.
In a word, no. Why would you want to?
No