In most cases, there is a machine on the driver's door and if you have a valid bus pass you place it on the machine and there is also usually a receptacle for paying with cash or coin.
Of course he can! All cats come again eventually. Keep setting out food he likes and the giant cushion and he might come. Remember to check his top 3 goodies...
Go to "Insert", and near the bottom of the list you'll click on the "Header and Footer" option. There should be an option to insert a page number with four...
As you know, it's not fixed that you should only put memories in it. If you have an old picture/drawing you drew in your childhood, or a beautiful picture depicting...
I don't think it matters whether you fight Bowser before getting all the stars or not. As long as you have 120 stars when you defeat him, you'll get Luigi.