Recently, I damaged my front suspension on a ****ty road so I changed my OEM suspension to Ohlins R/T and planning to get alignment.
Do you need to change camber and toe when you get a new suspension?

 

Yes. It'll all go out of whack if changing suspension parts, especially struts/coilovers.

 

You can have them use stock settings when they do the alignment, or you can go more aggressive if you want. It may just come down to what they can do, because the range of adjustment might only allow for certain combinations.

 

You will need an alignment. If you set the Ohlins up as recommended in the instructions, you should be able to get aligned pretty close to factory specs. Most tire wear is caused by incorrect toe settings, so a little extra camber is fine.

 

Ok, I went to the dealer today and they put it like this. Is it ok?

 

That's fine. But the car would handle better with 2* camber up front.

 

Seeing as you know where the front toe is now for zero, if you drill a tinny countersink mark it would be a good reference mark
To make it 4deg total toe out up front for a keener tracky day, rotate the arms 3/16" 4mm (to be shorter)
You can always return back to the marks after the tracky day
That's so long as you don't alter the front height. If you do, the marks will be wrong