hey Leen, for shoes, yes, they should be clear - i've seen girls who have some with little fake crystals or whatever on them though in a little line, and those are pretty. it seems the standard heel height is 4 or 5 inches. check out
http://www.bikini-beach.com/pumps16.htm - ignore the last two pics - overboard! i got the ones in the second pic, and they are very comfortable actually. i've heard other girls get the shoes for cheaper elsewhere, but this is the only link i have right now!
as far as suits are concerned, if you don't know anyone who competes (and whose suits you could either borrow or buy!), cynthia james makes very nice suits. she IS expensive though (seems like most of the suits i've seen run $300-$800 - specially made). i believe there are a couple of threads on bb.com forums that will tell you other places to get suits. just do a search and they should come up.
good luck!
ps: here is the thread i was thinking of for suits!
http://forum.bodybuilding.com/showthread.php?t=426272