Unlike other posters, I only have a passing familiarity with Kyoto. But when I have been there, the only time I took a train as local transport was to get to and from the village of Kurama.
It depends on where you are staying and what your plans are, but I regard Kyoto as more of a bus city.
Here are the main points as I understand them:

There is an excellent pass for the Kansai area - the Kansai Thru Pass. It makes places like Himeji Castle extremely accessible. 4,000 yen for two days (5,200 for 3). A return trip to Himeji would normally be 3,200 (Karasuma to SanyoHimeji, about 135mins each way), so good potential for savings - just as long as you do make a longer trip or two during your stay. Covers most buses and the independent rail lines.
Link to pass details - KANSAI THRU PASS (English) | Ticket&Goods | SURUTTO KANSAI
And transport covered - KANSAI THRU PASS (English) | Ticket&Goods | SURUTTO KANSAI
The Kansai Thru Pass also offers discounts on admission at a very wide range of places. For instance, a 200 yen discount on entrance to Himeji castle. Details can be found here - http://www.surutto.com/images/ticket...facilities.pdf
(Don’t forget to look into the BIC Camera deal)

For local travel, there is the daily bus pass (600yen) https://www2.city.kyoto.lg.jp/kotsu/..._card_bus.html

Suica is a JR East brand, for Kansai it’s ICOCA.

There is a daily Kyoto bus and rail pass, but it’s about 1,200yen. I guess it would work for some visitors, but I can’t put myself in a scenario where it would make sense. As I said, am not a Kyoto expert.