If you want simple answer, type tce, press s, and type jwm.
1. jwm.tcz
2. Xfbdev-jwm-desktop.tcz
3. Xorg-jwm-desktop.tcz
4. Xvesa-jwm-desktop.tcz
chose 4
press q
press i
and then startx
If you use 64-bit TC version for x86 then Xvesa-jwm-desktop.tcz will be not available.
If you want long answer, then tell us what window manager you choose in TinyCorePlus.iso?