your absolutely right! but with Pro Tools M-Powered you can buy a sound card/interface set-up for as cheap as 100-200 dollars.. i would spend the 200 on an old mbox because you get mic/line inserts plus headphone and speaker outs... and the preamps are dope for the price... plus the the converters arent bad... but m-powered is almost as powerful as LE now..
like the other dude said.. thats all fine and dandy... but to run 32 to tracks simaltaneously w/ plugins and a low latency rate your gonna need a computer that can handle running all that at once.. a 2 year old personal computer filled w/ porno, mp3's, and spyware wont cut it... I have a G5 Mac designated to only run my pro tools software, cd/dvd burning software, Final Cut Pro... the only time i go online w/ it is to update or download software/plugins.. and to send out MP3'S, Wavs, and zip files..
and if u think ur gonna learn pro tools in 6 hours, your a complete moron.. you'll get some basic skills, but it takes some cats a whole lifetime to really be an expert... i learn something everytime i do a session... cheers.....