when i turn my heat on i hear a noise but dosent work. other issues also

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Ok so if i turn my heat on i hear a noise under the pass side however no heat blows out unless im driving and i presume thatas the hear coming off of the engine. I bought a new blower motor but i want to ensure thats the issue. Also if anyone has any instructions on how to install i was told it was fairly easy. ok next thing my gas needle does not work all the time. the cruise control dosent work anymore lastly what type of oil do i put in it. i actually went to the dealer and they said 10w30 during the winter becasue its not as thick.. however, they couldnt tell me for sure. any assistance is appreciated