My #1 critique on those pics is the mentioned white balance, the colors are off. Something on the camera might be set off.
Next up is exposure. Looks like those were taken midday and midday lighting is harsh and hard to make look nice. That's why photogs call early and late day hours the golden hours. Your midday pic with too harsh lighting made it impossible for your camera too handle, the difference between the brightest and darkest (contrast/dynamic range) is just too much for it.
Having the sun at your back is not necessarily the best either, you can work it with it behind for some interesting looks too. Heck, I managed to catch this on the end of a rainy day with my smaller carry around camera.
Watch the horizon, sometimes you can do it for effect, but most people find it distracting when you have the horizon in your pic and its not level.
As someone mentioned, getting low angle shots does give a more aggressive feel, but play with all kinds of angles.
Watch the reflections too, if it's intentional it can be cool, but usually when you get yourself in a reflection into your pic it's goofy.
Getting a big fancy camera with a nice lens does afford you tighter depth of field, that's the effect you see where the subject is nice crisp focus, but the fore and background are blurry. With small cameras its difficult to get the effect, to get the most of that if its a zoom lens set it wide and get as close physically as you can. If you can control camera setting, set the shutter speed fast and the aperture big (lower f number).
Be aware of stuff in background, if you shifted your angle a bit in the second pic you might have been able to get the other car & trashcan out of the pic, and the glare off the water also out of frame. The reflection of the water can look neat, but its too much in this case and is blowing out the exposure.
As another post said, look at pics you like, then try and figure out what it is about it you like and what made it like that.