[Star]

For your first question, you ask any online mod or admin to set a warp for you when you're ready. They'll teleport over to you, ask what you want the warp to be named, and you show them the way you want them to be facing (the warp will be facing that way when they set it). They'll ask you to test it once they set it, and if it works properly and is set up how you want it, you'll do /pay (their ign) either 400 (for VIPs) or 500 (non-VIPs) and you'll be all set.

For the second question, Nuked answered it pretty well. In addition to their explanation, I believe all VIPs can create warp signs.