Doug - every email system has a different way of forwarding old emails. Some let you click a box at the top of the list, which chooses all the emails in the entire list. Then you click Forward, enter the To: address, click Send - and it's done.
Others make you choose each email separately, then forward. Best way to get the method is to contact your email provider, or if you use something like Yahoo or AOL or GMail, google searches usually give the answer.
I've never forwarded lots of email, so can't be of help.
Hang in there.
Tom M.