Wotcha and welcome - If it has been sat unused for some time start checking around for oil leaks as they dry out through lack of use.
I would do a full service back to front replacing all fluids - oil, diff, brake. Check your tyres have not gone hard, brake caliper pistons not siezed. I would also consider replacing the brake lines - even stainless steel braided lines have the tubes go off over time.
Next would be going through the bushes seeing if any have perished
Safety first