Hi. I don't know if you want to adopt specifically a swiss child but one of the best websites to start researching about adoption is http://international.adoption.com/
and I know a few people who used it to start their search.
About adoption in Switzerland specifically try http://travel.state.gov/family/adopt...untry_332.html
. Although this website is primarily for US citizens wanting to adopt from Switzerland they have the process quite well explained and can help you to get a clue what expects you.
Don't forget that, like everything is CH, it varies from canton to canton so maybe your best bet is to contact the town hall/gemeinde and ask them how adoption procedures work in your area.