I need some info about queries
 

How much should an average query number for the forumhome (index), showthread and view profile?

I currently have 34/20-45/20, and I have a god damn lot of hacks and mods installed ;)

Anyways, how much queries can a decent server take before it becomes too much?

You should aim for each page to have less than 30 queries on it.

forumhome should be less than 30.

showthread less than 30-32?

forumdisplay less than 30.

Depends on the server. On a shared server, even if you cut down on queries, but another site on the same server is a query hog, you still suffer.

On a dedicated server, you have a lot more room to play with. But aim to keep things light, and remove unnecessary hacks. Remember, sometimes less is more.