Hey I have a question… Would riding on the road, on a mountain bike, wearing mountain biking shoes, jersey and shorts look rediculous? Haha, its just that, I ride a mountain bike, and I think if I were to wear road cycling clothes, it wouldn’t really look very uniform… And I think riding in mountain biking gear on the road would look rediculous, but I want to know what you guys think. I don’t ride a road bike because any little bump or rock you ride on feels like you just hit a huge speed bump….
Haha… I’d love to get a full carbon road bike… But maybe after I finish college and have a good job…. Those road bikes are way too expensive. =\

OK, I’m not a pro, but I’ve been an amateur (mtb, road, cyclocross) for 20 years.

There’s nothing wrong with wearing ‘road’ clothes on an MTB. Since you framed your question with regards to pro cyclists, you should note that the only pros that do _not_ wear lycra are the downhillers. All cross country racers dress in lycra:

http://www.cyclingnews.com/mtbphotos.php?id=/photos/2008/apr08/mtbXC2worldcup08/mtbXC2worldcup084/men201

But really, you should dress in whatever you’re comfortable in. I personally can’t stand the baggy MTB look, but I know plenty of guys that feel the opposite.

I would like to compete in my first triathlon this summer. I am very clueless on how it all works. First of all, I own a cheap mountain bike, will this do for the bike section or am I going to get laughed at on my huffy? Second, do you have to wear a wet suit and if not and don’t own one do you just wear a bathing suit? When in transition after the swim do you put other clothes on? How do you find your bike? I just don’t know all the little things and if someone could help me out or point me in the right direction for a beginner I would appreciate it so very much. I don’t want to go pro I just love challenging myself. I’ve done a marathon and now I want to try something new. All the websites I’ve gone to don’t offer answers on the little things and I’ve never seen one so like I said, I’m very clueless.

Oh my. You need to come up to speed very quickly.

Read.
http://www.active.com/triathlon/Articles/Beginner_s_triathlon_gear_list__No_need_to_break_the_bank.htm
http://www.beginnertriathlete.com/
http://ezinearticles.com/?Triathlon-Beginner—7-Tips-For-Your-First-Triathlon&id=618481

To the bike part. You don’t necessarily need a tri/trials bike, but you will see plenty of them. What you do need is a competent road bike. I doubt you could finish the bicycle leg on a mountain bike.