I am wondering how much it would cost, and what it would be, for a good tier 1 set. I have only been on the site for 3 days so I don't know a lot about it. I have a little more than 5.5 mil right now

Check the tier 1 section here

Honestly, other than the phoenix quill which you will use in every tier, nothing should be worth more than 50k or so? Tier 1 won't last that long at all and it's not really worth spending much on.

Honestly, I use Item Hunt weapons for my T1 pets and they're practically free. If you autotrain you'll be a T3 in no time.

I spent about 800K between tier 1 and 2. I mostly used the recommend items on the thread Kbbob posted.