It is possible to disable your account password by heading to User Accounts in Control Panel. Alternatively, click the account picture that appears right at the top of the Start menu when you call it up and this will take you directly to the same screen.
In the upper portion of the main screen will be "Change your password" and "Remove your password". Click on the latter and all you'll have to do is enter your password once (to confirm that you are the account owner) to be able to remove it. Job done!
As for turning off the onscreen keyboard. This is a feature of Windows tied in to the Accessibility options. On the OSK itself in the right hand side keys is one marked 'Options', and clicking this brings up -you guessed it- the options window. At the bottom of this is a blue underlined link 'Control whether the On-Screen Keyboard starts when I log on'. Clicking this brings up a control panel window with a very simple tick-box 'Use on-screen keyboard'. Just untick this to make OSK go away