Launcher + game bugs/technical problems.

ZodiariumMoon​  For the blank launcher, please clear Edge's Internet Explorer-mode data, as described towards the end of this article:

https://support.microsoft.com/en-us/microsoft-edge/view-and-delete-browser-history-in-microsoft-edge-00cf7943-a9e1-975a-a33d-ac10ce454ca4

This may or may not help with the password.  If not, does your password contain special characters?  The launcher and game don't handle those well, so try using a password with only letters and numbers.

For the graphics issue, please provide a dxdiag.  Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.

Please also open DeviceConfig.log, in Documents > Electronic Arts > The Sims 3, copy the first 40 or so lines (stop when you get to Options), and paste them here.  You can delete your user and computer names, about 20 lines down; the file doesn't contain any other personal information.

For the sims not in houses, if you use any mods, please remove them and start a new save, as a test.  NRaas mods are fine, but anything else is worth removing, at least temporarily.