WTF is with the TRA website? How to order tickets?!

Seriously, this is the type of crap that really sours me on Taiwan. The TRA website (English side) is full of dead links, poor chinglish and is pretty much bloody useless. I just want to order some tickets from Taipei to Kaoshiung. I have to go thru several different sites within the TRA site. There is no information on the prices. It wants my passport number to do an inquiry? Then I fill out the form and it says the booking is successful without even telling me how much? Has anyone figured out how to use this site??