I'm a new tortoise owner myself so i'l try my best to help but i'm sure some more experienced owners will answer soon enough

I have Oscar in a vivarium, one end is 90-100 (about 95) and the cool end is 70-80 (about 70-75 most days). I have his lights set to come on at 10am and go off at 10pm, you should only have his lights on 10-12 hours a day.
I have a basking bulb and a uv strip light. The UV strip light supplements the sun and vitimians he would get from it (while its winter and he can't go out) and the basking bulb for him to bask under! I know you can get an ultimate bulb that does all of this but is just one bulb but i'm sure others will tell you about that or you can have a search around the site about it!
For the substrate, i don't think its wise to keep her on newspaper too long, i've noticed people on here only do this if absolutely need be! On here most people us 50/50 bed-a-beast and sand. I used a grass substrate, its like compressed grass nuggets which eventually break down, and i spray it a couple of times a day. He seems to like it

The humidity should be between 40 and 50 but i think its ok to go nearer 55-60 i think, mine is at 58, which is slightly high but i have his doors set open all the time and he seems fine

Like i say, i'm new to all of this and still have a lot to learn but that is my 2 pence worth
