I just bought a Nikon D90 with a 18-105 lens.needed BADLY?

No matter how much I try and whatever settings I use, the pictures end up looking fuzzy and weird. I would also like so tips on still life photography at home, since I can only venture outside about twice a week. Also, what setting can I use to capture life in motion, for example, and man walking in the rain, without the resultant motion blur? No matter what setting I use, the result is always disappointing.

You're encountering the fact that such a camera needs a skilled user to make it shine. You are lacking those skills. Get a book (dslr photography for dummies for example), DVD or course to get to grips with basics like shutter speed, aperture and iso.

Give your self some time! Read (user's manual) and try out all the functions of the camera a number of times.

It helps to understand how a camera works, what settings you control, and how to manipulate the settings to get the result you want. It takes a lot of practice and a lot of shots, but in time, you'll get it. Here is a site that explains some basic concepts:
http://tynan.com/understanding-how-cameras-work-to-improve-your-shots

I suggest you read the sections on Aperture and Shutter Speed, the two main components of a camera that you control and that work together to achieve the desired result. There's also a section on what settings to use for different types of shots, like sports and other moving subjects. Read that. It will help.

I can tell you that in low-lighting situations, such as your man walking in the rain (I'm assuming it's not sunny out) that you'll need to speed up the shutter to eliminate the blur, but at the same time, increase the aperture to let in more light and prevent a dark picture. If you're in school and your school offers a photography class, take it. It explains a lot about the mechanics of your camera so you can use it to its full potential. After all, it's not the camera that takes the picture, it's you.

Oh and one more thing… Make sure that your lens is set to auto focus, at least for now. There's a small switch on the left side of the lens that is set to either "M" or "A." Make sure it's on "A" for automatic focus. Maybe that will help with the fuzziness.

There should be a sport mode for capturing action shots. Set your cameras to auto focus and top dial to sport mode and point and shoot. You really don' need to do a lot of settings just support the camera and hold steady. Pushing down the shutter release button half way and follow the subject and it will stay in focus then push the rest of the way to take the picture. Check out (Digitutor) the tutorials online at Nikonusa.com for your camera.

Okay lets try something,

Turn the selection knob to auto.

on the lens you need to have the switch to A not M.
keep VR on

on the camera body by the lens switches you will want the switch set to AF not M.

on the back of the camera, hold the ISO button and rotate the rear dial button to read 200 on the lcd display.

Now take some pictures, see how that works…

…
Remember this camera is not a point and shoot, you look thru the view finder don't be using the LV (live view) button all the time to view what your taking a photo of on the rear display.