should be a sticker on the side telling you current draw. If current draw is not posted it should at least say wattage wich using voltage divided by watt will give you amps.
in canada anyways the sticker has to be on the motor to get the ULC/CSA stamp. I'm sure it's the same on your side of the border.. but you should be fine with 14AWG wire.. as I doubt it will draw more than 15 amps.. wich is a typical household circuit.
just guessing it's probly around 1-2 amps
If you are adding a circuit for the pump, I would pull 12 gauge wire for a 20A circuit. That gives power for the pump as well as lights and outlets for radio, etc. Whatever circuit you put it on must be GFI protected, either via breaker or a receptacle.
The 1 HP Power Flo Matrix PN SPX1510Z1XE is rated for 12 amps.