I don't have the use of my legs, so I use a wheelchair to get around.

I can't walk, so I use a wheelchair as a means of transport.

I can't walk and use a wheelchair to move.

Я не хожу

I can't walk

i've got problems walking

I've got mobility problems

использую инвалидное кресло как средство передвижения

(so/and/therefore)

I use a wheelchair +

....as a mobility device

.... as a means of transportation (иронично)