Can't focus on object with Nikon D7000? Any advice with settings?

I've been trying to figure out how to use my Nikon D7000, I can't manage to get a clear photo. What happens is I'll get a clear shot but the edges of the item well get blurred out. The background is always blurry, there's probably something I'm doing wrong. Any advice on the settings? I've attached two photo's, those were the best I could do.

[url=http://postimage.org/image/nw978r…
[url=http://postimage.org/image/urv4yt…
Added (1). Those photo's I attached won't work, here's the correct ones. Also if you know any links that you believe would be helpful please let me know.

http://postimage.org/image/nw978rs9n/
http://postimage.org/image/urv4ytehf/
>>> Can't focus on object with Nikon D7000? Any advice with settings?

Starting photography?

Hey i'm 13 and am just starting to do photography i'm getting a Nikon L310 bridge camera would this be ok
>>> Starting photography?

Can I use lens of broken camera?

First of all, I had camera, like Nikon Coolpix S550 10 MP Digital Camera which didn't work, so I took it apart.It has a lens and I was wondering if I could somehow use it on my Sony HDR-CX110. Lens looks like this --> http://i.imgur.com/FApO8.jpg <---
and at the end, naturally had a sensor like this: http://i.imgur.com/DzQuy.jpg.
My first question is: The image what the sensor sees comes from the light rays which cross at the same point where the image sensor plane is and the information is sent to the camera, right? like so
--->
Well, instead of the sensor, if I put focusing screen there, like those ones:
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Delectronics&field-keywords=focusing+screen&rh=n%3A172282%2Ck%3Afocusing+screen
Question 2: If I change a sensor with focus screen: , will the image appear on it? Like shown here:

So I came up with a structure:
Is it possible?
Please answer my 4 questions… (Forth question is with the image below)
http://i.imgur.com/KAz2d.jpg
Added (1). I already figured out how to play with zoom and focusing, all I need to know is - if the image will be projected to focusing screen…
>>> Can I use lens of broken camera?

Use digital Camera lens on my camera?

I had a digital camera like this: http://www.amazon.com/Nikon-Coolpix-Digital-Optical-Graphite/dp/B0011N17RU
It didn't work, so I broke it into peaces.
I took the lens from it, which looks like this: http://i.imgur.com/FApO8.jpg
At the back like this: http://i.imgur.com/Hao3R.jpg
And it's focusing screen: http://i.imgur.com/DzQuy.jpg

Well, I like hacking things and stuff. Wide angle lenses cost a lot, so I thought, I could buy a focusing screen: http://www.amazon.com/Canon-EeS-Focusing-Screen-EOS/dp/B000BS3ROC/ref=sr_1_6?s=electronics&ie=UTF8&qid=1354514557&sr=1-6&keywords=focusing+screen
And focus an image on that. I will attach my video camera on that lens so it will become wide angle, like this: http://www.youtube.com/watch?v=q2zBT9jMoyM
I figured out how to play with the zoom and focus, but the only thing is: Lens' focusing screen is few times smaller than canon focusing screen. I can get from Amazon, so, as I guess, projected image will be small and with my Sony camera, I'll have to zoom more on the focusing screen.
So the question is: Is the quality of focusing screen that good, so if I zoom in on it, it won't reduce quality of an image?
To better understand, here is the image: http://i.imgur.com/KAz2d.jpg
>>> Use digital Camera lens on my camera?

Digital Camera Upgrade from Samsung S730 to Nikon L810?

I wish to Upgrade from my Samsung S730 to a Nikon COOLPIX L810 and wish to know is this newer model, 720p, a lot better or just so-so ok of an upgrade?

Also, how important is 1080p HD versus 720p HD with still pics, not movies ???

thanks
>>> Digital Camera Upgrade from Samsung S730 to Nikon L810?

What is your opinion on the Nikon Coolpix L180 Digital Camera?

I am supposedly getting one for Christmas and I was just wondering if anyone has any personal experience or opinions on it?
Added (1). Here is a link: http://www.adorama.com/INKCPL810RD.html?gclid=CN-U7ZWl_bMCFUWo4AodR1cAdw
>>> What is your opinion on the Nikon Coolpix L180 Digital Camera?

My coolpix p100 will not turn on.?

I have a coolpix p100 that will not turn on. When i plug it in, the charging light flashes orange like it is charging but when I press the power button nothing happens. Does anybody know what I could do to make it turn on? It's a really nice camera so I would really like to fix it. Please no "take it into a camera store" I know I could do that but I want to see if theres a way I could fix it myself
>>> My coolpix p100 will not turn on.?