So you have a
K100D? That's a fairly old camera, hope you got it for a really low price. The K-50 is a much newer camera and can be found for under $300 (think its a generally better camera and a great camera for beginners)
Anyway, you can use the Auto Pict mode, which should do everything for you. You can use P mode, which is fairly automatic, but you still get some choices.
The problem you mention can be caused by one of the following.
a) EV +/-. This is Exposure compensation and tell the camera to make photos brighter or darker than it normally would. Reset this to 0, in case you have any other value
b) Exposure bracketing. This is an option that automatically adds EV+/-, so that you take three photos and they are bright, normal, dark (or other order of those three). This can be selected in the Drive mode menu
c) Metering mode. You can choose spot, center weighted, or matrix. For daylight, you probably want the one with the widest area, matrix or center weighted. Spot metering can be useful, but you have to really know how to use it.
d) You might have a damaged lens. If the aperture blades on the lens don't move as they should, this can cause odd exposures. This can be checked if you have more than one lens or camera.
e) Jpeg mode: Some cameras allow Digital filters and Jpeg mode, like "Black and white" or "Vibrant" or "Film reversal". Some of these can add effects and brighten or darken some parts of the photo. I suggest you disable any Digital Filters and choose a simple Jpeg mode like Bright or Vibrant or even Film Reversal.
Its probably a or c. Anyway, Micromacro has a good idea - reset the settings. Then Auto Pict or P mode should give you pretty good photos straight up.
Oh, and the "amber" cast is probably caused by WB, white balance. To change this you press the WB button and choose the best white balance for your scene, or Auto. Auto is pretty good, but its not foolproof. I prefer to manually select Daylight for Daylight, Tungsten for indoors, and so on. If camera has CTE WB, you can try that one for sunsets and such (this WB option emphasizes the current light colour, rather than neutralizing it)
Edit: Oh, and welcome to the forums