I am a little confused

Ok I want to make a thing so when I press a button it will slide also
what propertie do I have to set for my thing for example
models/props_wasteland/tram_bracket01.mdl is it func_something? or what
how do I go about doing this.

I'm a little confused too, actually.

I want a bracket to move some place when I press a button. so in other
words I want to move a world model after I press a button.

how much does it need to move, direction, rotation, etc... need a little bit more info.

it just needs to move when I press a button from one spot to the next I want it to be a world model tho

if your just sliding it a little bit (dont know that model off my head), but you might be able to:
-create a func_button
-texture with NODRAW
-give it a name
-remove flags so player can't use
-flag it passable (just in case)
-set directions for movement, speed, and distance
-have your other button activate this one
-and set the world model's parent to this button

as im not really for sure how you want it to move, this may or may not work for what you are trying to achieve.

what entity do I set what too for the slide thing.

just make it a func_door if you only want it to move from A to B

ok cool um also can I make it go from B back to A?

Ok I still dont understand I just want a brush to move when I press a
button so when I press a button the brush will slide across the floor I
need to know everything from beggining to end.

Good suggestions have already been made, but I'm still not utterly sure
what you meant in the first place. You say you want to move a world
model but also put the path to a prop - so do you mean an object you
built in hammer, or an object that was built in an external program
(ie. a prop)?

If you are using a brush based object, then you will want to look into
using a func_door most likely as it is the simplest object you can have
move from A to B and then back again. There are loads of tutorials out
there on these entities and HL1 topics will still be relevant, so go do
a bit of research. It may not seem it at first, but you can change the
distance that the door travels by giving it a lip value.

If you want a prop to move, then your simplest option would probably be
to make a small func_door that works the way you want, and then put
your prop into the level in the right place and set its "parent"
property to the name of the func_door. This will make the prop_dynamic
move along with the func_door, thereby giving you your moving object.