Waterway has a habit of producing impressive looking filters that under perform. I can tell you a 1hp pump is WAY too big.

Here are some options:
Intex 28651 16-Inch 3200-Gallon Sand Filter Pump
Hayward S144T1540S Top-Mount 14" Sand Filter 4-way Valve & 40 GPM Pump
I think the Hayward would be a better choice, but having not been hands on with one, I don't know what it would take to adapt it to an Intex pool.

Regardless of which pump and filter you get, you'll need all the items below or their equivalent. Keep in mind that Lowes / Home Depot / etc sell some look-alike junk, so check ratings and reviews carefully.
TRC 26020008-6 12/3 GFCI Protected In-line Tri-Cord Set 15-Amp
US Wire 74100 12/3 100-Feet SJTW Yellow Heavy-Duty Lighted Extension Cord
Intermatic P1121 Heavy Duty Outdoor Timer 15 Amp