The first thing you have to do is (to) find a place .

[abo.omar]

a- The first thing you have to do is find a place .
b- The first thing you have to do is to find a place .
Are both sentences right?
Is there any difference between them?

 

[teechar]

a- The first thing you have to do is find a place.
b- The first thing you have to do is to find a place.
Are both sentences right?

Yes; you can use the full or bare infinitive in the above.

Is there any difference between them?

Sentence "a" is smoother.

 

[Tarheel]

Ron: What's the first thing I have to do?
Bob: The first thing you have to do is find a place.
Ron: A place for what?
Bob: You don't need to know that just yet.

;-)

 

[abo.omar]

Ron: What's the first thing I have to do?
Bob: The first thing you have to do is find a place.
Ron: A place for what?
Bob: You don't need to know that just yet.

;-)

I am asking about a certain thing so I adjust my question for that thing.
Get it, brother ........or find a place.