As a person who has practiced both as a solitary Wiccan and in a group setting for the least 17 years, I can assure you that nothing is required in order to practice Wicca.
That being said, since most wiccan work is concerning the natural elements, of course it is preferable to be outside on a nice day, but if it's 10 degrees and sleeting, you'd hardly be able to focus on the task.
Regarding tools: Absolutely nothing is required. A pointed finger does the same thing as an athame (ritual knife.) I personally recommend two of the least expensive ritual supplies on earth, an incense you like and a handful of candles. Simply taking the time to light a candle or two and light some incense helps you get in a proper ritual mindset, creating a sacred space in which to work and calming your body and mind.
The only book I recommend for a solitary Wiccan is "Wicca for the Solitary Practitioner" by Scott Cunningham.
Barring that, I also recommend witchvox.com, an excellent resource for solitary practitioners and a wonderful community.
Pay no attention to anyone who says "You can't make your own rituals."
Any self made ritual is made with more focus, determination, and understanding of purpose than something anyone else wrote.
Religion, and Wicca in particular, is personal and a voyage of self discovery.
I wish you the best of luck in your voyage.
Solitary practitioner for 16 years, currently in a Gardnerian coven