i thought the tremulous comunity was nice and helpfull?

As you've probably figured out by now, the Tremulous community, and particularly the tremulous.net forums, aren't exactly what I'd describe as "nice and helpful." Believe it or not, it actually is helpful, but it's also got a serious sarcasm streak, and it doesn't take too kindly to anyone it perceives as not willing to look up and learn things for themselves, especially if the request for help is full of misspellings and bad grammar.
Actually, they just tend to respond negatively to bad grammar in any situation. You may think this is silly, but always use proper grammar--such as correct capitalization, proper use of "to" and "too", etc. It probably comes off as nitpicky, but trust me, it makes you sound much more intelligent and communicates your thoughts much more clearly. I don't know if English is your native language or not; if it's not, mention that it's not and people might cut you some slack.
Now, I don't have a lot of experience with texturing or modeling, so I can't help you much. Conzul already linked you to a couple places. He warned it, and I'll second it: texturing and modeling, like programming, mapping or pretty much anything, is a lot of work, and often newcomers don't realize how much work it is. Often it's a fight just to
learn how to do things, much less actually do it.
However, if you really are serious about it, you can do it. Like Conzul said, Blender is a program used for making models, animations, and effects. It has a reputation for having a horrible interface, but plenty of people figure out how to use it, so you can too. I believe there's plenty of great tutorials out there, just google around for them. If I remember right, there's some great videos tutorial on YouTube, so you can check there too. Conzul also linked to a post on the forums explaining how to export md3--the model format Tremulous uses--from Blender. He also linked to the modding section of the forums. You'd be surprised at how much information is in the forum archives. At the top of the page there's a search link--use that to look for answers before you post a new topic, because a lot of the common questions have already been answered. If you do that and still can't find an answers, it's ok to post a new topic, but make sure to post it to the correct forum (such as the modding forum), and make sure to use proper spelling and grammar so people know you're a serious, intelligent person asking a question.
So, basically play around with stuff, search around the forums and the web for information and see what you learn. It's hard to recommend particular stuff because we don't know how experienced you are with computers and with texturing and modeling in general. If you have any experience, tell us about it, and maybe we can help you more.