How do I know if I am eligible for opening trading and demat account?

How do I know if I am eligible to open a demat account?

Do I need a demat account if I only intend to do day trading?

How will I be guided during intraday trading? How do I know if I am going wrong?

What is the essential difference between a trading account and a demat account that is opened with a broker? Do I need to open both the trading account and demat account simultaneously?

How do I go about opening my demat account, I want to start trading?

How does the operation of trading differ from demat account?

What if the mutual fund holdings and demat account names don’t match?

After opening online demat, I am asked for verifying myself. What is that?

Any specific advantage of linking banking, demat and trading account?

Can I add my wife as joint holder into my existing DP account? Also, my wife wants to change her name in her demat account from maiden name. Is it possible?