Sorry, I had confused the TS321 with the LM321 in my previous statement.
The TS321 is indeed not an opamp with RRIO, but needs some distance especially to VCC to work correctly. The input common mode voltage range is given in the datasheet for VCC=30V and has for the whole temperature range from 0...VCC-2V.
The safety margin of 2V will be slightly larger with smaller VCC, but is not part of the guaranteed parameters.
The values for the output voltage can be found together with the environmental conditions in the data sheet, table 3.
The datasheet instantly answers all of those questions. If you cannot see those answers, it means you do not even understand the terms, which you are asking.