If you can afford to buy your own crutches, have a look at the http://www.coolcrutches.com/ website. You can get some in different colours, but they’re not cheap. There are plenty of other places you can look. Otherwise, you’ll need a referral to (I think) occupational therapy for some nhs ones. Mine are/were purple.
The next step up from crutches is often a walker, just round the house even. I have a Topro walker - it has a seat integral to it, as well as a basket for transporting things round the house. Not that I use the seat really, but often people do. You can get cheaper walkers, I broke the brakes on one I used to have, they were a bit flimsy really and I used them a lot. Walkers do make you feel a bit self-conscious at first, maybe it’s the thought of being an old lady with a walker!
I use a manual self propelling chair provided by wheelchair services. If you find you need a chair, that’s the place to start - get a referral from your neurologist. There are plenty that are available to buy but probably best to start with to get one free from them, then later if you want / can afford a flashier one, you’ll know what you’re looking for.
Generally, wheelchair services only provide electric chairs for people who can’t self propel and who need a chair indoors and out. I can self propel indoors but need a pusher for outdoors. I don’t actually want an electric chair as it would rob me of the tiny bit of exercise I get just moving round the house. Not that I think I’d get one anyway!
Other people use scooters outside, if you have the space to park one and can afford it it might be worth considering.