To create a Farm List, you need to have purchased Gold Club. You will find the option to create a farm list in your Rally Point. I'm going to show you how to build a safe starter farm list of inactive villages. Once you made your farm list, you can use the rally point option to check or edit it. For convenience, the farm list is one of the first links I put at the side of my page, together with links to gettertools inactive page and kiriloid.
To start your farm list, you need to be in gettertools, on the correct server and the page that searches for inactives.
Select your starting village and how far away you want to search. You also have the option to set the travel speed.
Click search and you will get a list of all the inactive villages within the range you set. If you hover over each one, you get the option to open in Travian.
Click on this which will take you directly to the village in the map.
Clicking on the village, you will see the option to add this to your farm list. You will also be able to see if anyone else in your alliance has been raiding it.
The number of troops you choose to send will depend on the size of the village. For a starting farm list, I wouldn't add anything with a population much over 100. These slightly larger villages may have troops in so will need scouting and possibly clearing first. Sending lots of small raids to very low pop villages is safer for now, so I am just going to add these with a couple of Theutate Thunders to each.
Work through each of the inactives in the Gettertools list until you have built up your list. Now all you need to do is select them all by clicking the bottom box, then start raid and all your raids will go out at once.