I am really new to Linux, but have encountered a few issues since installing and running Ubuntu. some help would be appreciated.

Some of the keyboard shortcut buttons fail to do anything, (back and forward in web browsers)

The Trackpoint mouse device works, however the central button fails to work, so i cannot scroll through documents. ( it's a bit like the scrolling function on the side of a touch pad or the roller wheel on a regular mouse )

Any help from anyone would be appreciated,