No. This course doesn't teach those forms. They are considered more advanced. If you are familiar with them - you will be able to practice прийшов, вийшов, перейшов, відійшов.. using other available resources. You are asking too much of the course.. It just can't satisfy everyone's linguistic hunger.
їздити is a multi-directional counterpart of one-way verb "їхати". It may be iterative, yes. It may also be used for a round trip, i.e. to refer to the fact that a person made a trip to Denver, but is already back (or somewhere else they are supposed to be).
Sometimes you may use it to express the idea "She has been to Denver (at least once)", i.e. made a trip there at least once in the past and returned.
їздити usually means a completed round-trip. Вона їздила в Денвер, means that this trip was completed sometime in the past, and she's no longer in Denver.
Вона їхала в Денвер, means only that she went there, unclear whether she is still there or not.
іти and ходити have to do with walking, with the same concepts of completed and/or habitual trips with the verb ходити. Він ходить у школу. "He goes to school [Mon.-Fri.]." Conversely, він йде в школу. "He is [physically, at the moment] going to school.