Not that mobo I originally picked out, but then you wouldn't want that one with a Q-core anyway. (there are better)
Thermal paste is a conductive paste that help the transfer of heat, reducing the temp on the CPU and giving better performance. You want to use it. Trust me, just do some reading around the forums sections, and you will learn alot. There is a search tool in every section that allows your to keyword your search, to help with specific questions.