This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
You can't get MySQL to work at all unless you have a user name and password. Assuming you have got it installed, you need to do some setting up after installation, you have to set up user accounts with privileges if you need them. Note there is a tutorial as chapter 3 of that manual, and there are different manuals for the different versions, eg 5.0, 5.1.