1. yes, less queries is always better. A good host should certainly be able to handle 67 queries! I run sites that generate much more than that.
2. Without programming skills you are out of luck. I'd hire a developer. Even with programming skills, if these requests are coming from multiple plugins, they will have a hard time combining them. Its not exactly an easy thing to try and do. :-)
Adding more plugins is not the answer... Reducing them might be.
Try turning some things off.
I suggest a dedicated server, if you really have the traffic to demand it, a dedicated server from an excellent hosting company will do the trick. I recommend SSD hard drives, nothing compares with the speed boost you will get.