Make sure you do not have any auto tone adjustments being applied upon import (check if any box is checked in preferences->Presets). In that same screen hit the "Reset all default Develop settings". Also check if you are not applying a preset upon import in the import dialog. Lastly, you might want to change the camera profile in Develop to "camera standard", at least if you have a camera from one of the major camera makers. This will make Lightroom render the colors like the standard jpeg rendering. Lastly, realize that Lightroom cannot read any of the in-camera settings (e.g. extra saturation etc) if you shoot raw. Those settings only apply to the camera makers raw software and no other software can read them, so if you shoot raw, it is best to set up your camera in as much of a default setting as possible.