Start HCG either the day you begin your Test, or 2-3 weeks after. Your not going to be shutdown that long, so its debatble whether HCG is needed. I think it is, personally.
Your PCT should last as long as it takes to resotore HPTA function fully. Thats around 5-6 weeks for me. A lower dose is better IMHO, than higher shorter doses.
40mg/ED Tamox is a very high amount IMHO. 20mg/ED will restore full HPTA function in 6 weeks.
If you decide to use Clomid, 50-100mg/ED for the first 3-5 days wont hurt. Then down to 25mg/ED IMHO.