Some I have lots of pics, some I don't, that's just how it is, deal with it.
Oboro's secret room (Hurricanger)
Under where the Hayate school was, there was a secret cave-like room with lots of monitors and computers. Also two couches with stuff animals of a Hawk, Lion and Dolphin and a table. Also, a special spot for Sensei the hamster with his exercise wheel. There were this two big doors that we barely ever seen open. We also saw a kitchen once and another time Nanami's room, we assume the trio slept there.
Dinosaur Tea House/Himitsukichi (Abaranger)
Japanese-style tea drinking place owned by Sugishita. It had a giant Tyrannosaurus head with table and TV monitor. The bar with kitchen and back room. Then there was the tea room with small table and dinosaur glass window and small room next to it. Then there was the secret Himitsukichi room with monitor, computers and med stuff.SPD Headquarters (Dekaranger)
Haven't seen every episode (go sue me), I don't know how elaborate it was but I know the main room had a big conference table, a higher table for Doggy, computers and Swan had her lab and the vehicles had their own place. There was also a cafe in there, where Swan and Doggy spoke to Miyuki Ozu in a flashback in the teamup.
Magic Room (Magiranger)
At the Ozu house, when you went through the wall at the stairs, you could enter this room of requirement. It had many books and stairs up to glass windows. Their mother went through the windows leading to a mirror room of the same room. There was a fireplace with a mural above of five magicians on horses lead by their mother. Magi Mother's Magi Stick was put on the mantel there. Two big doors lead to other dimensions. Their mirror alerted them of attacks. There was also a rack for their brooms.
Museum on the outside, inside there was their secret hideaway. In the main headquarter room, it had exercise equipment, table, seats, artifacts, books and computers. There was also a small nook for repairs and computer stuff. Mr. Voice communicated to them through 3 screens. It had a spot that had all the five colors incorporated. Then in Morio's Lab, he had a easy chair (for med stuff/recovery), his computers, artifacts, books, and shelves for the control drivers. Elevator took them down to the Gougou vehicles.
It was a big facility, there was a big training gym that was like a basketball court, showers, restrooms (the one we saw had no toilet) and the main conference room that had a place to train and computers. They had separate rooms for recovery as well.
They used the Gunjiro-01. In the front, there was two seats and chairs and couches. In the back, it was much more silver with Go-Onger symbols and lights. It had a spot for the phones and the engine case. Also a big screen and computers. They didn't show them actually sleeping there but it is assumed they lived there, at least the first 5. It was seen in RPM as Project Go-Onger.