Reddit mentions of Genuine Toyota Parts - Replaceable Element (04152-YZZA6)

An ASSTOY640 oil filter wrench. They are used to remove the caps of cartridge filter housings (an example with the tool to remove it installed on it) which manufacturers from many makes have started using in place of standard spin-on oil filters.

Instead these housings are a reusable plastic or metal container that house a replaceable filter element (this one is an example of a Prius filter) and depending on the vehicle manufacturer some require special tools to remove the cap correctly without damage.

Others though use a nut on top that you can buy a special socket set for although depending on the access available, you can sometimes use a regular 1/2 drive socket instead (Dodge Grand Caravans for example as they take a 24mm socket to remove).

The main reason why this tool failed though is because many Toyota models are known for breaking these tools when people overtighten the housings on reinstall and then when the next guy goes to remove the housing, it's simply on too tight for the tool to be able to withstand the force required to remove it. Heck I've seen one on so tight that an air hammer was required to finally remove it, followed by the last guy who installed it getting an earful about it.

04152-YZZA6
Amazon sells five packs. http://www.amazon.com/Genuine-Toyota-Prius-Filter-04152-YZZA6/dp/B007OW6JEI

Also, if you haven't done it yet, you'll want the ASSTOY 640 too.
http://www.amazon.com/Assenmacher-Specialty-Tools-TOY-640/dp/B0015PK3AG/ref=pd_sim_auto_3?ie=UTF8&refRID=1MXQBK1ZKTZSDZ4407XX

So if the labor will be performed by someone else, the only thing I need is the oil to replace the existing oil and the oil filter correct?

if so,

Genuine Toyota - Prius Oil Filter 1/2 Case (QTY 5) - 04152-YZZA6

http://www.amazon.com/Genuine-Toyota-Prius-Filter-04152-YZZA6/dp/B007OW6JEI/ref=pd_sbs_auto_4?ie=UTF8&refRID=06E9BPECFS0QV83TREH9

it says qty 5, how many do you use per oil change?

2010 Prius oil change
~4 quarts so

http://www.amazon.com/Mobil-96995-0W-20-Synthetic-Motor/dp/B000SKYL9I/ref=sr_1_1?s=automotive&ie=UTF8&qid=1414344172&sr=1-1&keywords=mobil+1+ow-20

or is there somewhere cheaper I can get same product?

Mobil 1 only please