See if you can find a manual on them off the net-it's easy to find omron ones for example. Obviously you'll need the model no. etc. In fact a manual would nearly be essential to run one in my opinion so you know how to navigate all the menus and set the parameters of it.
Plus a manual will give you all the details of which temp probe to use, which output type you have-usually a relay set up but the amp rating of the relay would be helpful as you may need to employ a secondary set of solid state relays possibly (sometimes they have a DC output designed to run a solid state relay direct, various outputs are possible on these controllers-you really need to know which one you have). It will also give you the wiring instructions. I'd find out the relay rating before trying to run something like an element but the pump should be fine.
Some controllers have a wiring diagram sticker on the back of them that shows you your probe type, input power and relay/output info but not all of them do. This may be enough to get you going but my guess is you will have trouble trying to navigate the menu to work out how to set your set temp. See how you go searching for one.
P.S. Would like some of these myself but I havent commited to one yet because I haven't found a price I'd be happy with.