Gibson Rickenbacker

Answer: Adding to the other answer, it was a trip to Paris for more than 9 people, it was for a total of 15 people. Also, it was Peter's brother Rob (he got a job promotion with transfer to Paris) who actually paid for those 15 plane tickets to Paris. Tickets for 2 of Uncle Rob's kids: Heather and Rod, who were still in school in the States (3 younger siblings are in Paris with parents, Rob and Georgette). Six tickets for Uncle Frank, Aunt Leslie, and their 4 kids. Seven tickets for Peter, Kate, and their 5 kids: Buzz, Megan, Linnie, Jeff, and Kevin (his unused ticket was accidentally tossed in the trash during the pizza dinner mess).

Super Grover ★

Answer: It's never revealed in the film, but director Chris Columbus recently did an interview in which he said that he and John Hughes had discussions about it and imagined Kate is a "very successful fashion designer," and Peter worked in advertising (though Columbus said he couldn't remember if they had a specific job in mind for him).