There are two basic approaches to obtaining a certain look with Photoshop: Either do-it-yourself, or download / purchase "actions" or plugins constructed by someone else. The previous responders gave good examples of both approaches.
Here's my philosophy on this: Because your starting images will never be the same as the starting images used to construct the illustrations (advertisements) for each action, unless you are very forgiving, you'll almost always have to tweak the results (or even the internals) of an action that you thought would be perfect. To do this correctly, you usually have to be reasonably proficient at PS. If you are, then you probably don't need to use someone else's actions, so I tend towards the DIY approach.
However, there is another use of someone else's actions: When you are starting out making efx, you can use other people's actions to learn from. This is especially easy with actions, because you can easily see the individual steps used in each action.
If I were going to attempt to figure out how, say, your first image was done, I would note that because of the artificial lights in the scene are visible, (A) it had to be taken around either sunset or sunrise. If you start with an image taken at some other time of day, you just won't get the same look. Next, note that (B) the brighter colors are warm, while (C) the shadow areas have a slightly cyan color cast. Also, note that (D) there are no real blacks in the 1st image, and that (E) the shadow areas are noisy.
Once you have the above analysis, you are more than half way home. Think of how you might do each of the above efx, "A" through "E", and put them together. There are many other ways to do it, but, for example, ACR offers you every one of the above efx. ACR does not allow you to synthesize other important aspects of the image such as the glow around each bright light source, but it will give you an excellent start without even going into the main part of PS.
HTH,
Tom