If you want to use all of Techguns machines, you need a mod that adds liquid pipes. The chemlab and the reaction chamber are not useable otherwise. Power requirement can be disabled in the config, so a generator is not essential.
Also you need to enable all ore generations in the config, if you don't use other tech mods that add it. Copper, Tin and Lead worlgen, and steel smelting.
WHere in the Config Is the power requirement I couldn't find it