Grub used to be version grub2, but now it's grub1.98(something). Grub menu used to be White on Black, not it's Black on Blue.

When installing trinity it asked me if I wanted to use the trinity desktop manager or slim, I chose slim. Slim didn't show trinity in the session options, so I manually changed the /etc/X11/default-display-manager to the one for trinity. Didn't load, and noticed the grub thing was wrong. The trinity thing wouldn't load, so I changed it back to slim and purged trinity from my system. Now slim will not load anymore. I have to run "startx" to get things started up.

I've tried running update-grub, and tried reinstalling grub, it didn't fix it. I am not sure where to go from here. Any suggestions would be greatly appreciated.

Grub in Wheezy is currently 1.99, it is 2 in Jessie.
What DE did you have before attempting to install Trinity?
Not knowing much about Slim it seems somehow installing Trinity has either removed Slim or it has installed Trinity's login manager and when you purged Trinity you removed the "default" login manager. I would suggest you reinstall Slim reboot and see what happens.
I have a Trinity install but there are big (name) changes coming so I am waiting for Trinity 3.5.14 to be released before I do anything else with it.
Let us know how you go.

So the problem with grub are its colors? These can be easily set via /etc/default/grub, since you are NOT on grub legacy, followed by an "update-grub" to make the changes to the relevant file.

Is there a display manager for trinity? The file /etc/X11/default-display-manager dictates which display manager should be used in case you have 2 or more of them. And since you are on slim, it should read "/usr/bin/slim" in there.
And trinity should be added in slim's sessions, inside /etc/slim.conf.

No de, was just running openbox.

Slim is still installed, and up to date. Slim is set in the default-display-manager as the default.

EDIT 0248 EST

I ran apt-get install slim and it said it was up to date. I also made sure /usr/bin/slim was the only line in the default-display-manager file. Rebooted and slim is working now. Grub actually is 1.99, but the menu colors are still messed up. How do I fix that part of things?

Adding trinity to the slim.conf file is something I didn't know I had to do. What exactly is the line I need to add to this conf file? I am going to try this again, and try that and update you on how that works. Thanks

There has to be a line like this one in /etc/slim.conf, so as to make sure slim does read the existing sessions installed on your pc
AND the trinity session to be in there too.

My folder has these, and I am not sure about that lightdm thing :/