I really do not know , how much is your linux know-how in general and Tinycorelinux in perticular , as you have already said that you are a newbie ! But if you really do not know many small things like :
If you forget to hit <ENTER> at the end of last line of the xorg.conf file, it may not work .
Then it is time , you better read FAQ and Wiki pages , links of which are available at top side of this forum's index page.
If a command with --verbose keyword is not giving any error, then you can try that command without --verbose option.
Also do you know that , you can also rotate screen in xvesa with following command :
Xvesa --screen 640x480@90x24
Though I have not tried it in TCL ! Since I have Intel chipset with Intel graphics card supporting high resolutions , I never faced so many problems in Xorg -except slow speed due to less RAM !
Lastly I would suggest , you better go one-step-at-a-time approach in TCL and allow some more time to experiment in Linux. Just try with xserver-xorg-video-ati extention loaded and then try " xrandr" command. See if any errors are repeated. You can always revert to prvs state by unloading the extention.
Also in older version of TCL , there was a bug in the xf86-video-intel driver , but then applying *xf86-video-intel v. 2.20.12* had solved xrandr problems. Hopefully current version of TCL may have solved many such problems without any patches.
In the mean-while keep reading and trying various options of "xrandr" command. Different distros with different hardware requires a lot of "try and error" approach. There is no Out-Of-Box and Fit-for-all soln in Linux , as you already know it !
Best Luck !