How do I view marriage records
You can’t view marriage records - if you mean official records which are kept by local register offices (maistraatti = http://www.maistraatti.fi/en/index.html ). They work together with The Population Register Center, which holds information on all Finnish citizens: (http://www.vaestorekisterikeskus.fi/vrk/home.nsf/pages/index_eng).
From the church (parishes) you get literary information about their members but you have to know the parish where the person is living.
To get information about an individual from these registers costs.
Some public libraries hold collections of old parish registers (mostly from the 17th, 18th and 19th centuries). You can find old marriage information on these microfilms, too.