Just like WN the security fee of up to $5 has to be paid.

Yes the usual seat fees of $6-$20 apply... though if you're A List with RR you can get Elite status on A+ and your seat fee and bag fee (2 bags) would be waived. Though any travelling companion not Elite would still have to pay them.

For a party of two unless you really want say exit rows prompt online checkin at t-24 normally has decent availability for free.