I need some answers about WRC

[buzmavisii]

1) Each country has national championships. I don't know soccer well enough to compare
2) Basically anyone with enough money and a license
3) A car manufacturer hires a team to build a WRC version of their car and run it in the series. Thus, each team uses only one brand and model of a car. Sometimes private drivers rent or buy the cars so they can be run outside the official teams.
4) Most of rallying happens on roads which are public, or used for everyday traffic. However, during the event the roads are closed from traffic.

Thanks for answers.

For first question, If driver wons national championships, will driver participate WRC? Is there something like that? or it's only about second questions answer.