How do you change pedals?

and remember : The right side pedal has a right-hand thread (removes counterclockwise, installs clockwise). The left side pedal has a left-hand thread (removes clockwise, installs counterclockwise).

Heres is a handy site for any repairs you might want to try

You simply hover mouse over part you are working on

http://www.parktool.com/blog/repair-help

Yes, grease them as per the park tools site. You will be glad you did if you ever need to remove them. If you have no grease you can get quality copper grease in any motor factors and it lasts a long time because you don't tend to use that much..... unless you have lots of bikes