Better idea - go to YAST / Install Software and search or tk and tcl.
Alternative good idea:
su -
zypper in tk tcl
Further information:
These programs are available in the distribution itself - you do not compile them or any other software either. You acquire them from so called repositories where packagers pre-compile these files for end users (like yourself) for easy install.
TK and TCL and both located in the 11.0 Main OSS Repository.
I agree. But anyway if you want to be able to compile programs by yourself you have to install at least make and gcc. Again they are available trough yast