It does count towards total time... I'm not sure how much you could potentially save by building a bunch of glider time if you're going the Part 61 route though when you consider all the complex time, night time, and the substantial XC PIC time you will be required to have.
Pretty easily, essentially all of the time I had from 150->250 hours was either in gliders, or towing them.
Glider hours absolutely count as total time. That will be most useful for you getting to the 250 hours total time for a C-ASEL.
You can get a Comm Glider cert at 100 flights PIC, after that, give rides for 100 hours, or get a CFI-G and instruct until you have the time for the CFI-A. The CFI Airplane ride is considerably easier to walk into if you have already been instructing in gliders. Getting paid for that time also beats paying someone else for it. In my case, I had about 100 hours of towing/glider instructing/glider flights before getting a C-ASEL. The glider club paid for half of my tailwheel endorsement, and did my CFI-G essentially for free. I probably spent $2,500 on glider flying over 18 months, ended up with two ratings, and doing the math, that worked out to ~$25/hour. Would be a bit more if you didn't already have a PPL, but not much.
You'll still need 40 hours in airplanes to get a PPL-ASEL, but the flying/landing/airmanship will come easily. You'll also need a bunch of X/C PIC for the instrument rating eventually, but that's way off into the future. Conceivably, you can get to CFI/II with only about 100 hours in airplanes (assuming you do the instrument ticket at the end, half of it in a complex ).
Added benefit of a glider club - it is a pretty social place. You wont end up building a lot of time fast, but you will end up meeting a folks with a ton of aviation experience. Many that are CFI's, or own airplanes, or know people, etc.
In my opinion, a great way to get started - very minimal investment, and will only help you.