Is there anyway to give priority to text for google bot, like tell googlebot to ignore some parts of a text and emphasize more on a specific part ?
Oh, is that so. But headline <h1> text becomes too big. Can i wrap my important content in headline text and then make the <h1 > text size small using CSS ?
Well not sure about google, but for Yahoo you can use <div class="robots-nocontent">blah blah</div> and "blah blah"text will be not indexed/included.
Yes, you can, but the more text you put in here the more watered down its value of being h1 becomes. I'd just keep your main key words only in h1.