Here's a short script that illustrates all the operations you describe:
To see how the operations work experiment on a Table 1 in Sheet 1 that has a least 8 columns and 7 rows with some values in column 2.
set {sh, ta, co} to {"Sheet 1", "Table 1", "B"}
tell application "Numbers"
tell document 1
tell sheet sh's table ta
# select a column
set the selection range to its column co
# copy values from selected range
activate
tell application "System Events" to keystroke "c" using {command down}
# paste values into a new range
set the selection range to column "C"'s first cell
activate
tell application "System Events" to keystroke "v" using {command down}
# format a range
set column "A"'s format to checkbox-- or number, date and time, currency, etc
# add a column
add column aftercolumn 2
# delete rows
delete (rows 6 thru 7)
# delete columns
delete (columns 7 thru 8)
end tell
end tell
end tell
SG