2.4 Tacoma ac compressor replacement

I was just wanting to know if anyone knew how much Freon is suppose to go into the system as I ordered a new compressor and I am having jiffy lube pull all the Freon out tomorrow so I can install the compressor. I am debating on refilling it myself since I have a few cans of r134a. I do have gauges and a vacuum pump to check to see if it holds a vacuum after I install it the compressor. The compressor was fine but the housing that held the locking Clíp broke when I tried to force the pulley off trying to replace the clutch. Any advice and tips would be greatly appreciated. Thank you all for your time