pretty simple you wont get good quality in an inbuilt webcam so just buy an external USB one:
http://www.pcmag.com/article2/0,2817,2369175,00.asp
your net surfing depends upon the quality of your net connection, for example you wont get as much speed over wifi as you will with a wired gigabit ethernet connection. As long as you have a dual core processor (nothing below a core i3) this should suffice.
I wouldn't go below 3GB of RAM In fact i would recommend the following:
Intel Core i5 (Quad Core)
4Gb RAM
Windows7 64bit OS (you choose the edition)
as long as you have these components you should have no qualms doing what you said above, just dont expect to do any hardcore gaming.