wordpress site transfer

Sad me. 3 months ago (sth. or sb) else 40

I moved an entire website built with WordPress (latest version) from one IPS to another.I only have admin credentials to log into the WordPress panel. There are
Can any expert give me some guidance on the following questions?

1. which plugin can I install and really rely on to create a full offline copy of my entire site, configuration, local media, etc? I would like to create a full backup on my local hard drive and then do a full restore of everything after installing WordPress on a new server.

2. I don't know where phPmyAdmin is located. Is it possible to find the IP of the server where the databases are located through wordpress administrator?I think I have to log into phPmyAdmin and export all the databases, right?
3. Any other suggestions?