New Member - Post size on blog (thumbnails + normal)

Hello,

I know nothing about html and I need some help to design my blog. I want the two latest post to appear in normal size with large image and I want the rest of recent posts to appear as thumbnails below the main two posts. I have found a code on a website which made all my posts thumbnails. But I want the two latest posts to appear in normal size. How can I do that? Does anyone have a html code for that?

Blog example/idea (not mine blog, but this is how I want it with two normal appearing posts and rest as thumbnails):

sweet2eatbaking (.com)

I hope someone can help me.

Thanks in advance.

Creme

This is the code for image: (an example)

<img src="fbcdn-sphotos-f-a.akamaihd.net/hphotos-ak-ash4/397026_213079622119505_814827930_n.jpg" width="1200" height="1000">

You can edit height and width so that first two images will be big and others will be small