Why Are My Film Pictures Coming Out So Bad.?

Ok, i have a nikon fg-20, pro film slr camera. It was very expensive at least 700$, it was bought back in the 80's. After many years, no one thought it would work. Then, my grandmother gave it to me. i had to buy batteries for it and all of that. So, eager to see what i would get i put a roll of film in it . Low and behold they came out, but some of the pictures were combined with light a dark pink/ brownish mass, like the film was exposed to light before developing, ( which absolutely didn't happen

some of the pictures were crystalline like this:

http://flickr.com/photos/21762293@N04/24...

and some of the others, come up poorly like this

http://flickr.com/photos/21762293@N04/24...

http://flickr.com/photos/21762293@N04/24...

ranging from little brown to pink, all the pictures were taken by me, someone please tell me what the problem is so i can, if possible prevent it from happening again. ( i never opened the back of the camera, so that's not a possibility.

You have a sticky mirror. The clue here is that the lower half of the image is affected--the part that's at the top of the film (the lens reverses the image upside down).

The solution is to take the camera to a repair place and tell them you have a sticky mirror. They may or may not have the parts, or it may just be a cleaning, lubrication and adjustment (CLA).

Another option--get a used camera off eBay. If the repair will cost more than $45, I think it would be cheaper to get a working camera off eBay.

First two look normal. The third is out of focus and/or camera shake caused by too slow a shutter.

not focused right