1. If you want to send them all: Tools > Send/Receive > Send All
2. If you want to delete them all: Select any email > press CTRL+A > press
CTRL+D
3. If you want to send some and delete the rest: Open the emails you want to
send, then File > Send. To delete the remaining emails see #2 above.
You could have found the answers to these questions from Outlook's Help file
(Help > Contents and Index).