That's just the master cylinder portion of the assembly, A.K.A "Brake Master Cylinder, Cylinder Sub Assembly B", it doesn't include the brake booster portion, i.e. the little electric motor, the pump and the accumulator.
Pump and motor...$1290
47960-30030 - Motor & Pump - 2003-2005 Toyota 4Runner | nashuatoyota
Accumulator...$341
47950-30010 - Motor & Pump - 2001-2005 Toyota | nashuatoyota
Pump, Motor and accumulator assembly...$719
47070-30060 - Power Brake Booster - 2003-2009 Toyota 4Runner | nashuatoyota
But it does appears you can get the entire assembly for around $1300+ to $1400, it's real confusing because if you buy all of them separately it around $2000 to $3000, but can buy the entire assembly for the $1400, I guess this is where the dealers make their money, charge you separately for the parts but use the entire assembly to do the repair.
47050-60081 - Actuator Assembly 2004-2005 4Runner - 2004-2005 Toyota 4Runner | nashuatoyota
just spoke to the parts dept., and they confirmed that i could get the entire group for $1190, or just the master group for $1181! $10 more gets much more valuable item, plus less labor cost in swapping over stuff. can also find the whole group unit used in the $400-$600 range, which i have to consider with a vehicle with 230k miles on it.