You can use exactly the same options for `scp` as you can for `ssh`

 scp -o KexAlgorithms=diffie-hellman-group1-sha1 -c aes128-cbc [email protected]. remoteUser@remoteHost:/path/to/files... /local/path/to/files

See `man scp` for the details; here's the summary:

> **SYNOPSIS**
>
> scp [-346BCpqrTv] [-c cipher] [-F ssh_config] [-i identity_file] [-l limit] [-o ssh_option] [-P port] [-S program] source ... target