What's your budget for the laptop as the best one costs about 10k while there are plenty of great laptops for less than a grand that will more than do the job.
Photo editing software, Gimp is a really good free alternative. There's also Picmonkey, Pixlmator Pro and Pixlr that are free, paid the best are Affinty,Rebelle and corel Photo Paint.
Video editing software as mentioned by
@Dirty Schwein
Davinci does have a really good comprehensive free version you can get which has editing, composition, audio and video editing plus colour grading. You will need a powerful enough machine for it though.
Web cams, I would advise a Canon dslr with the webcam utility software, free download
Here if you want a great image. Also has the compatible models.