Forum:Dueling questions

I have four questions. It's been years and years since I last played yu gi oh and I'm getting back into it.

1. Can you play more than one magic card during your main phase one?

2. Can you play a monster and a magic card during your main phase one?

3. When you set a monster, can you flip summon it into defence or does it have to be attack mode?

4. When you summon a fusion monster, is it considered a special summon and could you normal summon a fusion material monster and then fuse it during the same turn? Would it be the same way for syncro monsters?