Navigation bar and Toolbar in ipad app at top of screen - apple's approval?

I have got a wire frame for ipad application, in which navigation bar and tool bars are placed on the top. And back button is placed in toolbar. Whether it violates apple's guidelines or will it be approved by apple for itunes store. Also one screen have toolbar like a navigation bar. Will it be a problem in approval?

I think you'll be fine. As long as your UI makes sense and does what it's supposed to, then I wouldn't worry.

If you haven't already, you should read Apple's Human Interface Guidelines. It will tell you all the do's and don'ts of designing a UI. And remember, they are what they are. Guidelines, not rules. I've never heard of an app being rejected because it didn't conform to them.