I just started TRT injections a month ago so I am new to all this myself. You may get better answers from some of the more experienced guys on here, but here is what I have been doing. For injections: 1 22g needle to draw with and another 22g needle for the injection. I use a 3cc syringe and I always use new syringes and needles. They are cheap so why risk an infection? I buy mine from the local pharmacy. I told them I was just starting TRT and the pharmacist was more than happy to help. Needles and syringes are cheap, don't forget alcohol wipes. I ordered my AI from Sarmsx.com..believe it was called LiquiAro. Customer service and shipping was great. As for PCT, there are numerous threads with PCT protocols, but I am sure someone will post one for you.