Laptops are almost universally sold with just the operating system (e.g. Windows 7) on them, together possibly with some office software (which is likely to be a time-limited trial of Microsoft products) and perhaps some security software. Everything else you need to provide yourself.
However there's plenty of free software available for download, which will do what you want (either on your existing PC or on a laptop).
For basic image manipulation, Google's Picasa software is highly recommended:
http://picasa.google.com/
Serif Photoplus Starter Edition is also very good:
http://www.serif.com/...ware/?MC=FSSPHOTOPLUS
However if you're serious about image editing (and you don't mind a fairly steep learning curve) you'll need a program like Adobe Photoshop CS5, which is what magazines, newspapers and advertising agencies mainly use for manipulating images. The problem with that is that Photoshop CS5 costs over 500 quid! However there's an open-source freebie which does just about everything that Photoshop CS5 can, called Gimp:
http://www.gimp.org/
(NB: If you download that program I STRONGLY recommend clicking the 'Documentation' link as well, to download the user manual. Otherwise you'll easily get lost with the complexity of what's available within the program).
Chris