I dont know, if it is right forum to ask such question. I am new in web designing and developemnt. I am confused with page layout and pixels.
How can I get right information on page designing, and idea of page layout, and pixel measuremnt.
I also want to learn web designing. What tools do I need?
w3schools is a good reference, but I'd consider a dead tree edition of something like Build Your Own Web Site The Right Way Using HTML & CSS from Sitepoint. Nettuts have some good tutorials too, some are paid, but the majority are free. One of the best ways to learn is to view the source of web pages that you like, just don't copy them! Don't run before you can walk; page layout and pixel measurements come with time, but learn the basics of CSS first. As for tools, all you need is a computer and a text editor. It's actually better IMHO to start with a basic text editor because you actually learn the markup properly.
EDIT: Another site occurred to me when re-reading your question. Designing for the Web by Mark Boulton is available online for free. It, as it's title suggests, is a good introduction to design for the web.
Try out http://www.w3schools.com/ for reference and you can try Notepad++, Eclipse, and other open-source text editors.
The Opera Web Standards Curriculum is a very good place to start the right way: http://www.opera.com/company/education/curriculum/