What do Buddist believe and what are the key principles you would tell someone who wants to know about it?

Buddhism is the pursuit of Enlightenment by:

Harming no-one

Helping everyone

Taming your own mind

Realising the true nature of phenomena.

You can find out more here http://www.nalandabodhi.org/

All the best to you.

Look to Jesus. He will guide you in everything. Start trusting Him today. Proverbs 3:5,6

SDA

Seventh-day Adventist web-site:

http://www.adventist.org/beliefs

Sabbath information site:

http://www.sabbathtruth.com/

Find an Adventist Church near you:

http://www.adventistdirectory.org/

Free Sermons/Online Bible Studies:

http://www.amazingfacts.org/

http://www.the-ten-commandments.org/the-%E2%80%A6

Buddhism is centered around proverbs and teachings all teaching the young "buddha" how to reach enlightenment.

Look them up. Google is free.