I can't get out of my car; can someone bring me a ballot to vote from there?
Yes. If you are unable to go inside the polling place a team of election workers will be sent out to your car to help you vote.
If I chose a party do I have to vote for all of their candidates?
It depends on the election. In primary elections, you can only vote for candidates from the party to which you belong. In general elections, you are free to vote for anyone you like, regardless of their party affiliation.