Methods of transportation from the sagas are all in here. Well maybe not all of them but I am working on it. I'll try to cover as much as I can, along with pictures. Please note that important vehicles held in capsules have their own page. Click what you want to read about below.

Nimbus Cloud-

This is the most important cloud in the show :). It originally entered Goku's family in the Dragonball series. Master Roshi gave it to Goku as a gift for carrying his turtle back to the ocean. Only those with a pure heart can ride it (Bulma fell right through).
In early Dragonball Z, it is used a lot by Goku to get around. Teen Gohan is also seen riding it numerous times before he gets his Great Saiya man suit. Then it was handed down to Goten.
Just remember when you are falling perilously through the sky, call "NIMBUS"!

Capsule Pod-

These space ships are very useful, although are not held in capsules. They are used numerous times during Dragonball Z. It has many nice features and a semi-comfortable interior when it is in flight. Probably the best feature is the training mode. Vegeta used this to train at 500x gravity when preparing for the androids. It comes equipped with little robots that shoot energy at the trainee.

Freezas Space Pod-

Frieza is often seen speeding around in this trendy pod. He is shown sitting in it before he wiped out the saiyans and their planet. It only seats one person and has a jet engine on the back. It can reach speeds of approximately 80 mph.

Gokus Bike-

This is Goku's bicycle. There is a lot of mystery behind this one. No one I know has ever seen him riding it. This probably belongs in the capsules section, but I though it was unique enough to have it's own. It has a capsle number on it (34), which means it came from a capsule. The most baffling thing about this bike is that the tires have the word "Dragonball" written on them. Was Goku ever this old in the Dragonball series? Or is it from the manga?

Time Machine-

This time machine was built by Bulma. It plays a huge role in the Android Saga. It was given to Trunks to come from the future to the current time line to warn the Z Fighters of the androids. His warning enables them to train and get stronger for the battles which proves to be life saving. He also becomes strong enough to defeat the evil in his own time.

Military Tank-

This model tank was sent to destroy Cell. During that time, Piccolo is fighting Cell. These tanks then opened huge volleys of fire upon him. They contain explosive shells. They were not effective against Cell but they would be deadly against humans

City Bus-

This bus was packed with tourists from all over the world. It was high jacked in "Orange City". A very roomy and rather luxurious bus. The tourists on here are pretty dumb. They even take pictures of the high jackers for their personal albums. Videl and Great Saiya Man save the day.

Saiyan Pod-

This is what saiyans use to transport around the universe. Goku was found on Earth by Grandpa Gohan in one of these. Also, Vegeta and Nappa both arrived at earth in these (as pictured). These pods are cushioned on the inside. They can travel at extreme speeds. Meaning that the only disadvantage is it is kind of cramped.

Turtle-

The turtle was found some way from his ocean habitat by Goku. Goku carried the turtle to the ocean out of the kindness of his heart. As a reward for carrying back his friend, Master Roshi gave Goku the Flying Nimbus. This is how Goku first met Roshi and got the Nimbus.

Videls Helicopter-

This is truly a beautiful vehicle. Very swift and speedy. Videl has the ability to jump out of it and it auto pilots itself to a safe area, and then flies back when she needs it.