The “T357” is probably a serial number, which MIGHT allow you to find when it was made.
Yes, I noticed that a vice is mounted (To my mind, the wrong way round) on the Cross Slide.
If the paintwork is anything to go by, it looks to be in reasonable condition.
Explanation of the gears and their uses, can wait until you have a little more experience, as can the many tools with the lathe.
By moving the belt between the pulleys on the motor and the counter shaft, you can vary the speed. Moving the belt across the pulleys in the countershaft and the spindle will provide another set of speeds.
It looks as if, in total, you have nine possible speeds available.
But be wary of using the highest ones. The spindle might well be running straight in the cast iron of the Headstock, and so not be suitable for sustained high speeds.
Use oil to lubricate the bearings, rather than grease.
Given a little time, things will become clearer, and you can expand your activities on the lathe.
You will be surprised that the jobs that you can do with it; when are experienced and familiar with the machine.
Do not expect the 3 jaw chuck to hold work absolutely concentric, but there are ways of coping with this.
As they say in Suffolk, “Make Haste Slowly”. take things slowly, and you will learn, even from your mistakes.
We all had to start once!
Howard
Howard