The main difference between Internet Explorer 6 and 7 :

• New stream lined look to maximise size of the Web Page view
• Tab headings across the screen so you can easily switch between web pages without losing the existing page
• Toolbars include search box, news, feeds etc. - basically layout of the Toolbars has changed
• You can easily change your search engine for the search box
• Reduces size of text when printing so it fits on the page
• Many of the IE6 security issues have been resolved

more Information.....here   

Most users do not like the look of the toolbars in internet explorer 7 as some buttons, e.g refresh and stop, have been moved.

If you would prefer the old style then I would suggest using the Quero toolbar which can be downloaded here.

In the options section of this toolbar you can hide the Ineternet Explorer 7 toolbar

enable the pop-up blocker

right click on the bar with the 'Home icon' and enable the 'Menu Bar'

right click on the bar with the 'Home icon' click 'customize command bar' then 'Add or remove commands'. In here you are able to add buttons like email,paste etc.