Question 1

Can you use this to refill the Terro liquid containers when they’re empty

Accepted Answer

I’m not sure of your question. It looks like these are 12 packages of 2 oz liquid. You would not need to refill anything. I did learn to keep the paper / cardboard tabs to put the liquid on in case you need it again.
The prouduct worked very well but ants came back in a different location so I needed the tabs to put the liquid on.  You can really put this liquid on anything.  Hope this helps . Very good prouduct .

Question 2

My ants roam most on stovetop (& trash-bin/counter near stove) but entry-point is at other end of counter (at porch door) so where do i put terro?

Accepted Answer

First of all, be sure you discover as much as you can about the FULL PATH from ENTRY POINT all the way to the TARGET. 
Then... you can actually drop a couple FEEDING STATIONS (on a 4x4 post-it note, for instance) anywhere along the PATH.

Best if you can keep it out of the way... like NEXT TO the WALL so no human or animal steps in it. 
Realize that it will probably take a few hours until you see a lot of ants gathering on the post-it note.

PS:   They're probably on the stove top wandering around for new food resources to find.
Two longer-term things that will help, once you get this batch under control:   
   - Wash out cans, bottles, etc before you put them in the trash/recycle bin.  That reduces target exposure.
   - Wipe down counters and stove regularly so they don't leave new resource targets on them, either.

Question 3

i seem to have both black & carpenter (as some are bigger) yet they all seem to gobble terro - so will they all get killed?

Accepted Answer

Yes, the product will kill the ants, but… keep feeding them. Only stop feeding them when they no longer want to eat the product

ASIN	B01MQGHHGX
Best Sellers Rank	#393,092 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #3,741 in Pest Control Traps
Brand Name	Terro
Customer Reviews	4.6 4.6 out of 5 stars (266)
Global Trade Identification Number	20070923002003
Included Components	12 Ant Killer Bottles
Item Form	Liquid
Item Weight	3.68 ounces
Manufacturer	Terro
Model Number	T200-12
Part Number	T200-12
Target Species	Ant
Unit Count	24 Fluid Ounces

TERRO Liquid Ant Baits T200-12, Liquid Ant Killer – 12 Pack

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