Yes. If you need assistance filling out your ballot ask a poll worker for help. A team of one republican and one democrat will come over and help you mark your ballot. Also available in each polling location is a ballot marking device that will read you all of the choices and then print out your marked ballot.

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.