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If news is your start page then this isn't a good idea - no one will know what else is at your site.
For your side blocks you can go to blocks, select the news page and make any blocks you don't want visible not visible by selecting the 'no' radio button.
For your header etc you will need to look into themes and i can't help you with that...sorry
Finally if it means you remove the login block I suggest you search for more information. If visitors can't see their login they can't login, log out or see their notifications....