i.e. bind f1 "buy awp; buy deagle; buy primammo; buy secammo; buy flashbang; buy flashbang; buy defuser; buy hegrenade; buy smokegrenade; buy vesthelm"
etc. Well after this all you'll need to type is:

bind f1 "awp; fe"

All you have to do is copy and paste this into your autoexec file:

//Buy Aliases
alias glock "buy glock"
alias usp "buy usp"
alias p228 "buy p228"
alias deagle "buy deagle"
alias elite "buy elite"
alias fiveseven "buy fiveseven"
alias m3 "buy m3"
alias xm1014 "buy xm1014"
alias tmp "buy tmp"
alias mac10 "buy mac10"
alias mp5 "buy mp5navy"
alias ump "buy ump45"
alias p90 "buy p90"
alias famas "buy famas"
alias galil "buy galil"
alias aug "buy aug"
alias 552 "buy sg552"
alias m4 "buy m4a1"
alias ak "buy ak47"
alias scout "buy scout"
alias awp "buy awp"
alias 550 "buy sg550"
alias g3sg1 "buy g3sg1"
alias m249 "buy m249"
alias he "buy hegrenade"
alias flash "buy flashbang"
alias 2flash "flash; flash"
alias smoke "buy smokegrenade"
alias kev "buy vest" //I personally prefer kevlar to vest
alias kevhelm "buy vesthelm"
alias nvgs "buy nvgs"
alias defuser "buy defuser"
alias pammo "buy primammo"
alias sammo "buy secammo"
alias ammo "pammo; sammo"
alias kevlar "kevhelm; kev"
alias fe "ammo; deagle; defuser; 2flash; he; smoke; kevlar; nvgs" //FE means fullequipment

This is pretty much self explanatory, edit as you wish