hi there :)
for starters you want to go with the EOS rebel cameras
a really good one is the EOS rebel XS
takes reallyyy good pictures! new is 600 bucks but used you can get it A LOT cheaper
remember, it's a starter camera so you don't wanna go all out
but if you end up getting more passionate about photography, you definitely want to upgrade to a newer model such as 5D mark II or 5D mark III, that's the model most of the professionals use
for websites, you might want to go to http://digital-photography-school.com/ for tutorials and such
however if you want to look at other peoples pictures, i would definitely recommend Flickr
http://www.flickr.com/
a lot of reallyy good photographers on there, you just make and account and start uploading pictures! you can look at other people's pictures
the really good pictures always make it to the "explore" front page
http://www.flickr.com/explore/
so i always check there from time to time
if you want to get reviews on any camera i always go to http://www.dpreview.com/
on F stops
this is what a picture looks like at f/1.4
http://www.flickr.com/photos/johnmueller/2568220692/ see how the back part of the image is all blurred out and only the flower is in focus
the lower the F stop the blurrier the background gets
here also he has a low F stop, and only the man's face is in focus
http://www.flickr.com/photos/johnmueller/2674066001/
then you go really high like f/22 and the entire picture is in focus
http://www.flickr.com/photos/johnmueller/1464428187/
we generally use higher f stops for landscapes because we want a nice crisp shot of the scenery
like this
http://www.flickr.com/photos/johnmueller/4399473238/
now this last one, was shot at f/22 AND they did a long exposure on it
long exposure is when you keep your shutter open longer than the normal 1/250th of a second
long exposure can last anywhere from a minute to 2 hours! when you do long exposure on ocean waves, your result will be the water looking like some sort of fog, which is kind of cool :)
also, for ISO
if it's a bright sunny day, mostly likely ISO 100 or 200
nightime, ISO can get pretty high, up to ISO 2000 or even 4000! depending on how dim your lighting is
the higher the ISO the more noise your image has, which basically means, the higher the ISO the more grainier it gets, you ever see images that look grainy? its because of that
BUT
there are really good cameras that are able to get rid of that graininess yet allow you to shoot at a high ISO, which is really good :)
lenses
anything under 50mm is considered wide angle (lowest it goes is about 14mm)
that allows you to get a wider view, let's say if you want to shoot some type of grand landscape or even a humongous group picture, you would use that type of lens
you can also use a wide angle for distorting images
like this guy, who used a 14 mm on a young kid
http://www.flickr.com/photos/isayx3/4475964995/
anything beyond 50mm is considered a telephoto lens
it allows you to zoom from really far away
http://www.flickr.com/photos/superjuanvi/4206853984/
like this guy was really far away from the skyline, and he wanted to zoom in on it, so he used a focal length of 200mm