Labradors are a type of retrieving dog. 
yes, I think bloodhounds fit into that same description if I am not mistaken.
I think bloodhounds were more bred for actually hunting rather then just retrieving. 
oh are there other retrieving dog besides the Labradors
The Irish Wolfhound was developed as a war hound and was used for hunting too
oh does that breed exist today
While the breed is VERY old; coming from 7000 BC, they are still around today. 
I wonder how hard it would be to find one these days, some breeds have been bred so much they are not like the original dogs at all
The Jack Russel Terrier is one of those. It's a small terrier that started out in fox hunting but has been bred to be a very different looking dog now.