how to add TTT addons

So recently I’v made a ttt server for my friends and me. I want to know how to make it so that it force downloads all the addons that I choosed. Please show me step by step as i am new. Also how many people can i host with 8gb ram, intel core i5 2500 and 5.00 mbps upload?

(User was banned for this post ("wrong section/stop posting in all bold" - postal))