1996 Landrover Discovery SE 7 w/ automatic transmission, can't get it out of park.

yes. pound on bottom of the steering column with the heel of a shoe, or the handle of a hearty screwdriver...recon spiders got in there and just need to be told to move along now~

The gear select cable probably seized up in the past two years of inactivity, it's a bit of a pig to get to but should be an cheap job to replace yourself.

blast the cracks with compressed air. maybe will let loose with a minimum of discomfort~

make bacon with that pig!