Do you have a permit for your loaded question? Ask 10 people what tent they recommend and you'll get 10 different tents, with 5 more tents as options. As others have said start out with a three season tent. Beyond that answer questions like, free standing? front or side entry? How tall are you? Anyone traveling with you? (1 or more man tent.) One might even throw the question in, Do you even need a tent? Tarp, hammock etc.
Sleeping bag? Synthetic or down? Some people have allergies to down, that makes their choice easy. Provided you can keep it dry, and can afford it, down really is the way to go. I personally own multiple down bags rated to different temps. I take what I need based on expected temperatures. I select a rating 10-15 degrees cooler than what's expected. Partly because of comfort and partly for safety if it turns out to be colder than expected. In the warmer range, 40+ degrees, weight savings for a down bag is minimal. (I often take a synthetic bag out.)
If I could only have one bag I'd go with a down filled 15-20 degree bag.