House Insurance and Odd's N Ends!!

Yesterday i just went to go look @ my first house! Im in love, it's so cute and homey! It is so much bigger on the inside than it is on the outside and it has a fenced in yard! Oh i love it! but anyways, before i make any complete decisions im trying to figure out how much things are going to cost me to make sure i will be able to afford it! What are some things i need to remember when buying a house? i want to make sure ALSO that i dont forget things and have something pop up that i cant afford! Another thing...where is a good company to get house insurance? thank you!!