2008 Yaris ac system

[esse10]

on a 2008 yr old model maybe the condenser is really dirty, check that. Does your engines electric fan come on when you turn the A/C on ?
You can't have cold A/C if the condenser is not getting air flow through it.
You know how to read/use manifold gauges? hook those up and see what the low and high pressures are before and after you turn on the A/C.

with A/C off both low and high pressures should be equalize and should be around 90-100 psi. when the A/c is turned on the low comes down to about 30-40 psi and the high go's to about 150-175psi. depending on ambient temperature.