1) There are modules (search CPAN for "INI") that can help you here. Let's forget that given this is an excercise.

2) I don't think you want a hash. Don't you want a list (read array) of records (read hash)?

my @list;

while (@art) {
   my $record = {
      "art"          => shift(@art),
      "produce"      => shift(@produce),
      "price"        => shift(@prices),
      "descriptions" => shift(@descriptions),
   };

   push(@list, $record);
)

print("We have ", scalar(@list), " models for sale.\n");
print("\n");
print("They are:\n");
foreach (@list) {
   print("Model:       ", $_->{"art"}, "\n");
   print("Produced by: ", $_->{"produce"}, "\n");
   print("Price:       $", $_->{"price"}, "\n");
   print("Desc:        ", $_->{"descriptions"}, "\n");
   print("\n");
}
[download]

Update: Typed printf where I should have typed print. Fixed