Deaths:

Goku
When he was holding Radditz and piccolo shot his special Beam Cannon.
When he teleported cell to King Kais planet and Cell Self-destructed.

Vegeta
When Freeza killed him.
When he self-destructed trying to kill Majin Buu.

Piccolo
Killed by Nappas blast while trying to save Gohan.
When Bebi blew up the earth.

Krillin
Killed by Freeza.

Choa-zu
Self-destructed trying to kill Nappa.

Tien
When used all of his energy up against Nappa

Yamcha
When a saibaman self-destructed

Android 16
when Cell crushed his head

Android 17
When Cell self-destructs
When Goku uses his dragonfist punch against Super 17

Android 19
When Super Saiyan Vegeta blew him up with his big bang attack

Android 20
When he gets his head kicked off by Android 17

Kui
killed by Vegeta

Reccome
Killed by Vegeta while laying on the ground in pain

Guldo
When Vegeta shot a blast that cut off his head

Burter
When Vegeta knees him in the neck

Zarbon
When Vegeta blasted him

Cell
Killed by Super Siayan2 Gohan with a one handed kamehameha

Cell Jr.
Killed by Super Saiyan2 Gohan with one kick

King Kold
When Super Saiyan Trunks blasts him

Freeza
When Super Saiyan Trunks slices him in half with his sword

Dabura
killed by Majin Buu when he was turned into a cookie

Grandpa Gohan
When Goku turned ozarhu and stepped on him

Dodoria
After he told Vegeta that Freeza blew up his planet Vegeta killed him

Radditz
When Goku held him and Piccolo shot his special beam cannon

Nappa
When Vegeta killed him because he was to weak

Majin-Buu
killed by Gokus Spirit Bomb

Gregory
When Cell self-destructs

Bubbles
When Cell self-destructs

King Kai
When Cell self-destructs

Dende
Killed by Freeza