You can set sitelinks in google webmaster tool, It is not sure that google will include your site links, It is pure automatics process
i think that you have a good chance to get sitelinks if you are on the 1st result of the term you targeting and also you need a good site navigation.
If you have good amount of ranking in google. You will get it soon if you dont have much seo done that you may require to strong your web seo and it is Automated process
This is completely automated. You cannot set your sitelinks in the webmaster tool. However you can remove the unwanted links from you sitelink (once you get them) using the webmaster tool. Just keep your site navigation clean and once you are an authority site for a particular keyword you will be rewarded with sitelinks by Google. All the very best !!