How to create menus in the blog.can anyone suggest me.

I really do not know what you want. But if you are talking about placing links, you can simply add them up on your blog. But if you like to create pages, then the best would be is to come up with a website. You can certainly add different pages on your website. I definitely suggest weebly.com since you can make a website for free with different pages. You also do not need html knowledge to do it. Visit my website on my profile. The website is made through weebly.

already pre gadgets is given.

Not EXACTLY sure what you're talking about, but... You could simply use hyperlinks to each one. Or, use HTML to create some sort of form (I almost wrote some form of form *groan*)

Thus, I really don't konw what you want for your question is so ambiguous. Perhaps you want to start a blog on WordPress.com or Blogger. If you did, you can creat menus just through some steps on their admin platform. But if you want to build with WordPress platform, It may be using some technology and tools, such as Frontpage, HTML editor and so on. If you have other questions? Contact me please. Good luck!