The Panasonic TZ1K does not have manual controls.
The Canon A series will have the controls you want:
The Canon A540, A620, A630, A640, A700, A710IS
all have manual controls.
The Fujifilm F30 would be the best choice for low light.
It has some manual controls:
I currently own an (old) Canon S200 and am looking to buy a new point and shoot camera. Here's what I've been looking for:
-good zoom (preferably 4x optical or up)
-a decent set of manual controls (ISO control, shutter speed control, etc)
-price ($300 or less)
The cameras I've been looking into so far include the Canon A series, the Panasonic Lumix DMC-TZ1K, the Canon Powershot series, and the Fuji FinePix F30.
I'm a beginner/intermediate photographer looking for a p&s that I can have some control over (and can take good pictures in lowlight).