When you are ready to take a trip up the tower, you can either get a Reserved Ticket
or a numbered ticket to line up for the Day Ticket. The price of the ticket (adults) to go up to the Tokyo Skytree Tembo observation Deck (350th floor) is 2000 yen
for fixed dates) and you'll need to pay another 1000 yen
to go up to Skytree Tembo observation Galleria (450th floor).
Tembo observation Galleria is open from 8:00~22:00 and the detailed explanation for each floor can be found here