Momaxima

Hey wassup everyone, I have a problem, but I don't know if it is that serious or anything cuz i am quite the newb. On mornings whenever I start my car for the first time for that day, it has a little slippage, im thinking the belt needs to be tightened. Another problem is that whenever i get to the clutch catch point (where it idles a little without giving it gas) not sure of the exact term, but anyways it makes this low hummin noise and its only when its cold, once i drive the car around for awhile its fine...sorry for the long post but that noise is really annoying in the morning and i hope to geebus nothings serious. Thanks in advance.