Goku - was 14 when db started 32 when db ended was 34 when dbz started 48 when dbz ended

Krillin - was 35 when dbz starts 49 when dbz ended

Bulma - was 16 when db started 34 when db ended 34 when db ended. 38 when dbz started 52 when dbz ended.

Tien - was 38 when dbz started 34 when db ended 52 when dbz ended

Yamcha - was 34 when db ended 38 when dbz started 52 when dbz ended

Gohan - was 4 when dbz started was 28 at the end of dbz

Trunks - was 6 when the Buu saga started

Goten - was 5 when the Buu saga started

Pan - was 5 at the end of dbz 14 when dbgt started

Bra - was 4 when dbz ended 13 when dbgt started

Dende - was 5 in the Freazer saga