Must get 32 Quest Points.
yes, most people join the champions guild when you have 33 or over quest points and they also join another guild as well
There is no "Rand Guild" in RuneScape. If you mean the Ranging Guild, that is members-only.
You have to be a member, its by the fishing guild.
There is no woodcutting guild (I wish there was tho)
Yes, you must be a member to enter the Fishing Guild in RuneScape. The Fishing guild is north of Ardougne, inside the members-only portion of RuneScape.
To join a guild click on the shield on the bottom left of the screen.
Yes.
Yes.
Most guild you can join simply by clicking "Join Guild" on the left sidebar. If the guild is private, a member will need to invite you before you can join. If you go to the Guilds section on the Neoboards and create a new post saying that you are guildless/looking for a guild to join/etc., you will almost surely get many responses from people that would be happy for you to join their guild.
Simple. Just go to your guild and put the activitys on the guild front OR go to your pet page and do it on there heres an example http://www.neopets.com/~gween_jub_jub
the fishing guild
Kill Gremlens