The male genital organ of higher vertebrates, carrying the duct for the transfer of sperm during copulation. In humans and most other mammals, it consists largely of erectile tissue and serves also for the elimination of urine.
'Ta' = Thank you
'La' = In this context friend or mate. Probably from 'love' or 'lad', being informal, affectionate names used primarily in the North; especially Newcastle.
"Now then our kid, got you that thing you asked for."