The Saint Row series seems about the most similar. Have a look at their website and see what you think:
www.saintsrow.com
yes it is the best game in the world i have all of them,but it mostly depends on your choice which game you would like.
yes
The movie or the video game?
its up to personal opinion but GTA 5 is newer and i personally like it better
Yes
gta is basicaly a mission based game. in this game u play the role of a drug dealer( in gta san andreas).
There is no building with the parachute in the game Gta vice city.The building is in the game Gta SA.You cannot get a parachute in the game of gta vice city.
No there is not a GTA game on a wii.
Difficult to suggest a game like GTA with a teen rating, because of the content. Have you tried Uncharted - Drake's Fortune? a game like gta ill put the names wheel man, bully, cop for the ds
GTA San Andrea is a good game to play just like Hitman absolution.
The Godfather and Mafia seems to be ok.
There are a few around 15gb like GTA IV