i dont know (mabe they just like your doorstep).
There is no species called 'desert toad.' It is just a generic term referring to any toad living in a desert.
A pigs head on your doorstep is an ominous warning to the recipient. This means that somebody might want to hurt you.
nothing, there is no meaning at all.
Your house smells.
Foully blemished
The toad
A puddock can mean a small enclosure for animals (paddock) or a frog like amphibian.
Traditionally, finding a penny is a sign of good luck. However, in Canada, where pennies are about to be phased out, finding pennies on your doorstep will soon mean that someone thinks you are in the scrap copper business.
Could mean anything, but my guess is your cat brought you a present.
You will meet with an untimely death
No, doorstep is a noun.