What to do?

I have just been given a wonderful gift… the starting supplies to create fantastic items with PMC3.  The sister knew I had half the battle won – as I create abstract equine sculpture out of low fire earthenware clay using a small ( inside 9” wide X 14” tall) electric kiln. 

My question is this – this kiln is somewhat old and is fired using a ‘kiln sitter’ 

How do I go about using the preexisting kiln????  I believe I need to purchase a

Pyrometer , but I posted the question hoping some one else has had this same problem/question and can point me in the right direction right away!  

I look forward to searching through the volumes of information on the forum!!

Thanks!