i'm getting a dell laptop (please don't comment on my choice, i had a limited price range) and i would like to know if i can get other accessories (i.e. webcam, programs, wireless mouse etc...) later or do i have to get them when i order it? ETA: and what about a wifi connector? my mom doesn't want wifi in the house, but if i'm at panera bread or the library or something it would be nice to use the internet there. do i need something extra?