Power Inverter Help

I know this has been asked before but I can not find anything using the search function. I wan't to get a relatively inexpensive power inverter that I can plug into my Prius power outlet or hook up to the jump start terminal under the hood, to power a few things in the house during a power outage. Tractor Supply store had a Schumacker 3000/6000W unit for around $129 that I was considering but the cords that came with it seemed that you had to bolt it right onto the 12v. battery. Can anybody recommend a good, easy to use power inverter. What is the biggest capacity you can use either with the power outlet or hooking up to the jump start terminals. Thanks all!