That's 4 questions, not 2.

FWIW: I like relatively cheap rims, like the Sun M13: http://www.comcycle-usa.com/ProductInfo.aspx?id=6389740 . However, I've been building bicycle wheels for 30 years. It takes a decent bike mechanic to build a wheel- it's not for beginners.

You'll also get a lot of advice on the Bicycle Mechanics forum. This is a forum for regional issues, while you're asking universal questions.

Here's your tires: http://purefixcycles.com/products/kenda-tire-set-28c