Can someone explain the basics regarding teams and sponsorships regarding Indycar?

Newbie here, please bear with me here. My questions may sound a little confusing so for some clarity I'll randomly use Mike Conway/Andretti...

Source: http://www.motorsportforums.com/forums/showthread.php?141739-Can-someone-explain-the-basics-regarding-teams-and-sponsorships-regarding-Indycar&goto=newpost

Silvio Habat Larbi Habbiche Ron Hackett