The B3 pump does come with a cord, but no plug. You will have to buy a 3 prong plug at Home Depot, but they are very easy to install. Other than that, just plug it in. As for a switch, you have a couple of options:
1) The simplest is an in-line switch like on a lamp where the cord goes completely through a manual switch with a plug on the end.
2) The next simplest is a switched outlet. This is one where you have an outlet with a 3 prong receptacle in one slot and a switch on the other. The switch controls power to the outlet.
There are other options, but these are the most straight forward.
Whatever you do, do NOT use a dimmer switch. This means death to your pump. Electric motors are funny that way. They like to run at the rated voltage - period. If you want to control flow, install a valve on the outlet side of the pump and use that to meter the flow. Also, never try to meter the inlet side of the pump. This will cause the pump to cavitate and is very hard on the pump innards.