~If you are truly interested, you shouldn't be asking on this site. You are apt to get much more reliable information from (dare I suggest it?) books.
First, you have to define "Inuit" and direct your search toward the particular group of interest. The are several varied cultures involved. You have to decide whether to include the Aleuts (I hope not), the Saami, the Yupik or the Inupiak in your subject group, for instance, or simply limit you research area to Alaska, Canada and Greenland. Unless you are in western Alaska, do not use the term 'Eskimo'. Inuit is an Inuktitut word meaning, loosely, 'the people. It is the plural of 'Inuk', meaning 'man'.
Except in the extreme north, where few settlements were tried, the did NOT live in igloos in the summer. Igloos melt. However, in the winter the igloos were well constructed and adequately warm, especially when lined with animal hides. Some lived in sod huts and summer homes were often tents made of animal hides.
Cooking was not that much of an issue. They believed raw food was more nutritious. They also ate frozen and dried meat. Fuel for fires included wood (drift wood or foraged wood from below the treeline). More often, they rendered animal fat - especially blubber (if the pantry was full and they had a surplus), they used moss, dried grasses or other dried vegitation and a primary source of fuel was dried animal dung. They could use these fuels for heat or for cooking. Another means to heat food was by use of rocks. They would warm rocks (with fire or by the sun) then place the rocks in hollows of larger rocks with the meat and some water.
They survived quite well for eons without European interference. They Europeans were certainly not their saviors. There is a lot more. As I said, this is a lousy site to seek information but this little bit might get you started.